Finding the Fourth Proportional to 908,078,414.10, 1,253,148,199.98 and 490,390,662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   908,078,414.10 : 1,253,148,199.98 = 490,390,662.50 : x
2. Step 2: Convert to fraction form
   908,078,414.10/1,253,148,199.98 = 490,390,662.50/x
3. Step 3: Cross multiply
   908,078,414.10x = 1,253,148,199.98 × 490,390,662.50
4. Step 4: Simplify right side
   908,078,414.10x = 614,532,175,992,609,024
5. Step 5: Solve for x
   x = 614,532,175,992,609,024/908,078,414.10
6. Step 6: Final answer
   x = 676,739,108.04