Finding the Third Proportional to 639,215,156,397 and 1,390,957,929,942

Step by Step Solution

1. Step 1: Write the proportion equation
   639,215,156,397 : 1,390,957,929,942 = 1,390,957,929,942 : x
2. Step 2: Convert to fraction form
   639,215,156,397/1,390,957,929,942 = 1,390,957,929,942/x
3. Step 3: Cross multiply
   639,215,156,397x = 1,390,957,929,942 × 1,390,957,929,942
4. Step 4: Simplify right side
   639,215,156,397x = 1,934,763,962,868,533,827,731,456
5. Step 5: Solve for x
   x = 1,934,763,962,868,533,827,731,456/639,215,156,397
6. Step 6: Final answer
   x = 3,026,780,487,768.82