Finding the Fourth Proportional to 76,553.61, 105,647.50 and 42,565.59

Step by Step Solution

1. Step 1: Write the proportion equation
   76,553.61 : 105,647.50 = 42,565.59 : x
2. Step 2: Convert to fraction form
   76,553.61/105,647.50 = 42,565.59/x
3. Step 3: Cross multiply
   76,553.61x = 105,647.50 × 42,565.59
4. Step 4: Simplify right side
   76,553.61x = 4,496,948,169.53
5. Step 5: Solve for x
   x = 4,496,948,169.53/76,553.61
6. Step 6: Final answer
   x = 58,742.47