Finding the Fourth Proportional to 78,390.55, 108,179.94 and 42,581.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,390.55 : 108,179.94 = 42,581.16 : x
2. Step 2: Convert to fraction form
   78,390.55/108,179.94 = 42,581.16/x
3. Step 3: Cross multiply
   78,390.55x = 108,179.94 × 42,581.16
4. Step 4: Simplify right side
   78,390.55x = 4,606,426,580.12
5. Step 5: Solve for x
   x = 4,606,426,580.12/78,390.55
6. Step 6: Final answer
   x = 58,762.53