Finding the Fourth Proportional to 78,328.71, 108,090.69 and 42,517.95

Step by Step Solution

1. Step 1: Write the proportion equation
   78,328.71 : 108,090.69 = 42,517.95 : x
2. Step 2: Convert to fraction form
   78,328.71/108,090.69 = 42,517.95/x
3. Step 3: Cross multiply
   78,328.71x = 108,090.69 × 42,517.95
4. Step 4: Simplify right side
   78,328.71x = 4,595,794,552.89
5. Step 5: Solve for x
   x = 4,595,794,552.89/78,328.71
6. Step 6: Final answer
   x = 58,673.18