Finding the Fourth Proportional to 670,499.92, 1,005,651.54 and 271,131.88

Step by Step Solution

1. Step 1: Write the proportion equation
   670,499.92 : 1,005,651.54 = 271,131.88 : x
2. Step 2: Convert to fraction form
   670,499.92/1,005,651.54 = 271,131.88/x
3. Step 3: Cross multiply
   670,499.92x = 1,005,651.54 × 271,131.88
4. Step 4: Simplify right side
   670,499.92x = 272,664,192,665.10
5. Step 5: Solve for x
   x = 272,664,192,665.10/670,499.92
6. Step 6: Final answer
   x = 406,658.05