Finding the Fourth Proportional to 54,288.86, 81,463.86 and 42,409.30

Step by Step Solution

1. Step 1: Write the proportion equation
   54,288.86 : 81,463.86 = 42,409.30 : x
2. Step 2: Convert to fraction form
   54,288.86/81,463.86 = 42,409.30/x
3. Step 3: Cross multiply
   54,288.86x = 81,463.86 × 42,409.30
4. Step 4: Simplify right side
   54,288.86x = 3,454,825,074.24
5. Step 5: Solve for x
   x = 3,454,825,074.24/54,288.86
6. Step 6: Final answer
   x = 63,637.83