Finding the Third Proportional to 12,905,721 and 28,087,380

Step by Step Solution

1. Step 1: Write the proportion equation
   12,905,721 : 28,087,380 = 28,087,380 : x
2. Step 2: Convert to fraction form
   12,905,721/28,087,380 = 28,087,380/x
3. Step 3: Cross multiply
   12,905,721x = 28,087,380 × 28,087,380
4. Step 4: Simplify right side
   12,905,721x = 788,900,915,264,400
5. Step 5: Solve for x
   x = 788,900,915,264,400/12,905,721
6. Step 6: Final answer
   x = 61,128,000.15