Finding the Fourth Proportional to 630,617,096.38, 945,922,203.69 and 257,123,517.01

Step by Step Solution

1. Step 1: Write the proportion equation
   630,617,096.38 : 945,922,203.69 = 257,123,517.01 : x
2. Step 2: Convert to fraction form
   630,617,096.38/945,922,203.69 = 257,123,517.01/x
3. Step 3: Cross multiply
   630,617,096.38x = 945,922,203.69 × 257,123,517.01
4. Step 4: Simplify right side
   630,617,096.38x = 243,218,843,825,892,800
5. Step 5: Solve for x
   x = 243,218,843,825,892,800/630,617,096.38
6. Step 6: Final answer
   x = 385,683,872.55