Finding the Fourth Proportional to 78,685.46, 108,585.96 and 42,875.48

Step by Step Solution

1. Step 1: Write the proportion equation
   78,685.46 : 108,585.96 = 42,875.48 : x
2. Step 2: Convert to fraction form
   78,685.46/108,585.96 = 42,875.48/x
3. Step 3: Cross multiply
   78,685.46x = 108,585.96 × 42,875.48
4. Step 4: Simplify right side
   78,685.46x = 4,655,675,156.26
5. Step 5: Solve for x
   x = 4,655,675,156.26/78,685.46
6. Step 6: Final answer
   x = 59,168.18