Finding the Fourth Proportional to 78,685.83, 108,586.41 and 42,875.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,685.83 : 108,586.41 = 42,875.80 : x
2. Step 2: Convert to fraction form
   78,685.83/108,586.41 = 42,875.80/x
3. Step 3: Cross multiply
   78,685.83x = 108,586.41 × 42,875.80
4. Step 4: Simplify right side
   78,685.83x = 4,655,728,765.63
5. Step 5: Solve for x
   x = 4,655,728,765.63/78,685.83
6. Step 6: Final answer
   x = 59,168.58