Finding the Third Proportional to 811,063,778 and 1,665,124,490

Step by Step Solution

1. Step 1: Write the proportion equation
   811,063,778 : 1,665,124,490 = 1,665,124,490 : x
2. Step 2: Convert to fraction form
   811,063,778/1,665,124,490 = 1,665,124,490/x
3. Step 3: Cross multiply
   811,063,778x = 1,665,124,490 × 1,665,124,490
4. Step 4: Simplify right side
   811,063,778x = 2,772,639,567,197,760,000
5. Step 5: Solve for x
   x = 2,772,639,567,197,760,000/811,063,778
6. Step 6: Final answer
   x = 3,418,522,244.99