Finding the Fourth Proportional to 399,131.72, 596,878.78 and 298,000.52

Step by Step Solution

1. Step 1: Write the proportion equation
   399,131.72 : 596,878.78 = 298,000.52 : x
2. Step 2: Convert to fraction form
   399,131.72/596,878.78 = 298,000.52/x
3. Step 3: Cross multiply
   399,131.72x = 596,878.78 × 298,000.52
4. Step 4: Simplify right side
   399,131.72x = 177,870,186,816.97
5. Step 5: Solve for x
   x = 177,870,186,816.97/399,131.72
6. Step 6: Final answer
   x = 445,642.82