Finding the Third Proportional to 644,924,973.50 and 1,316,919,499

Step by Step Solution

1. Step 1: Write the proportion equation
   644,924,973.50 : 1,316,919,499 = 1,316,919,499 : x
2. Step 2: Convert to fraction form
   644,924,973.50/1,316,919,499 = 1,316,919,499/x
3. Step 3: Cross multiply
   644,924,973.50x = 1,316,919,499 × 1,316,919,499
4. Step 4: Simplify right side
   644,924,973.50x = 1,734,276,966,846,411,008
5. Step 5: Solve for x
   x = 1,734,276,966,846,411,008/644,924,973.50
6. Step 6: Final answer
   x = 2,689,114,297.18