Finding the Fourth Proportional to 78,140.80, 107,834.82 and 42,330.82

Step by Step Solution

1. Step 1: Write the proportion equation
   78,140.80 : 107,834.82 = 42,330.82 : x
2. Step 2: Convert to fraction form
   78,140.80/107,834.82 = 42,330.82/x
3. Step 3: Cross multiply
   78,140.80x = 107,834.82 × 42,330.82
4. Step 4: Simplify right side
   78,140.80x = 4,564,736,355.15
5. Step 5: Solve for x
   x = 4,564,736,355.15/78,140.80
6. Step 6: Final answer
   x = 58,416.81