Finding the Third Proportional to 1,243,607,478.75 and 2,659,401,841.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,607,478.75 : 2,659,401,841.50 = 2,659,401,841.50 : x
2. Step 2: Convert to fraction form
   1,243,607,478.75/2,659,401,841.50 = 2,659,401,841.50/x
3. Step 3: Cross multiply
   1,243,607,478.75x = 2,659,401,841.50 × 2,659,401,841.50
4. Step 4: Simplify right side
   1,243,607,478.75x = 7,072,418,154,573,591,552
5. Step 5: Solve for x
   x = 7,072,418,154,573,591,552/1,243,607,478.75
6. Step 6: Final answer
   x = 5,687,018,030.55