Finding the Fourth Proportional to 78,745.86, 108,666.92 and 42,936.57

Step by Step Solution

1. Step 1: Write the proportion equation
   78,745.86 : 108,666.92 = 42,936.57 : x
2. Step 2: Convert to fraction form
   78,745.86/108,666.92 = 42,936.57/x
3. Step 3: Cross multiply
   78,745.86x = 108,666.92 × 42,936.57
4. Step 4: Simplify right side
   78,745.86x = 4,665,784,602.58
5. Step 5: Solve for x
   x = 4,665,784,602.58/78,745.86
6. Step 6: Final answer
   x = 59,251.17