Finding the Fourth Proportional to 990,086.99, 1,484,892.61 and 457,095.98

Step by Step Solution

1. Step 1: Write the proportion equation
   990,086.99 : 1,484,892.61 = 457,095.98 : x
2. Step 2: Convert to fraction form
   990,086.99/1,484,892.61 = 457,095.98/x
3. Step 3: Cross multiply
   990,086.99x = 1,484,892.61 × 457,095.98
4. Step 4: Simplify right side
   990,086.99x = 678,738,445,332.20
5. Step 5: Solve for x
   x = 678,738,445,332.20/990,086.99
6. Step 6: Final answer
   x = 685,534.16