Finding the Fourth Proportional to 287,841.30, 431,373.15 and 192,801.30

Step by Step Solution

1. Step 1: Write the proportion equation
   287,841.30 : 431,373.15 = 192,801.30 : x
2. Step 2: Convert to fraction form
   287,841.30/431,373.15 = 192,801.30/x
3. Step 3: Cross multiply
   287,841.30x = 431,373.15 × 192,801.30
4. Step 4: Simplify right side
   287,841.30x = 83,169,304,105.10
5. Step 5: Solve for x
   x = 83,169,304,105.10/287,841.30
6. Step 6: Final answer
   x = 288,941.52