Finding the Fourth Proportional to 404,153.78, 557,500.70 and 252,988.34

Step by Step Solution

1. Step 1: Write the proportion equation
   404,153.78 : 557,500.70 = 252,988.34 : x
2. Step 2: Convert to fraction form
   404,153.78/557,500.70 = 252,988.34/x
3. Step 3: Cross multiply
   404,153.78x = 557,500.70 × 252,988.34
4. Step 4: Simplify right side
   404,153.78x = 141,041,176,641.84
5. Step 5: Solve for x
   x = 141,041,176,641.84/404,153.78
6. Step 6: Final answer
   x = 348,978.99