Finding the Fourth Proportional to 56,813.61, 78,544.50 and 42,641.85

Step by Step Solution

1. Step 1: Write the proportion equation
   56,813.61 : 78,544.50 = 42,641.85 : x
2. Step 2: Convert to fraction form
   56,813.61/78,544.50 = 42,641.85/x
3. Step 3: Cross multiply
   56,813.61x = 78,544.50 × 42,641.85
4. Step 4: Simplify right side
   56,813.61x = 3,349,282,787.33
5. Step 5: Solve for x
   x = 3,349,282,787.33/56,813.61
6. Step 6: Final answer
   x = 58,952.12