Finding the Fourth Proportional to 78,323.90, 108,086.62 and 42,513.60

Step by Step Solution

1. Step 1: Write the proportion equation
   78,323.90 : 108,086.62 = 42,513.60 : x
2. Step 2: Convert to fraction form
   78,323.90/108,086.62 = 42,513.60/x
3. Step 3: Cross multiply
   78,323.90x = 108,086.62 × 42,513.60
4. Step 4: Simplify right side
   78,323.90x = 4,595,151,115.46
5. Step 5: Solve for x
   x = 4,595,151,115.46/78,323.90
6. Step 6: Final answer
   x = 58,668.57