Finding the Fourth Proportional to 78,330.40, 108,095.61 and 42,520.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,330.40 : 108,095.61 = 42,520.12 : x
2. Step 2: Convert to fraction form
   78,330.40/108,095.61 = 42,520.12/x
3. Step 3: Cross multiply
   78,330.40x = 108,095.61 × 42,520.12
4. Step 4: Simplify right side
   78,330.40x = 4,596,238,308.67
5. Step 5: Solve for x
   x = 4,596,238,308.67/78,330.40
6. Step 6: Final answer
   x = 58,677.58