Finding the Fourth Proportional to 76,857.57, 106,063.20 and 42,866.10

Step by Step Solution

1. Step 1: Write the proportion equation
   76,857.57 : 106,063.20 = 42,866.10 : x
2. Step 2: Convert to fraction form
   76,857.57/106,063.20 = 42,866.10/x
3. Step 3: Cross multiply
   76,857.57x = 106,063.20 × 42,866.10
4. Step 4: Simplify right side
   76,857.57x = 4,546,515,737.52
5. Step 5: Solve for x
   x = 4,546,515,737.52/76,857.57
6. Step 6: Final answer
   x = 59,155.08