Finding the Fourth Proportional to 527,499.81, 727,948.71 and 285,788.42

Step by Step Solution

1. Step 1: Write the proportion equation
   527,499.81 : 727,948.71 = 285,788.42 : x
2. Step 2: Convert to fraction form
   527,499.81/727,948.71 = 285,788.42/x
3. Step 3: Cross multiply
   527,499.81x = 727,948.71 × 285,788.42
4. Step 4: Simplify right side
   527,499.81x = 208,039,308,032.20
5. Step 5: Solve for x
   x = 208,039,308,032.20/527,499.81
6. Step 6: Final answer
   x = 394,387.46