Finding the Fourth Proportional to 78,685.56, 108,584.67 and 42,875.85

Step by Step Solution

1. Step 1: Write the proportion equation
   78,685.56 : 108,584.67 = 42,875.85 : x
2. Step 2: Convert to fraction form
   78,685.56/108,584.67 = 42,875.85/x
3. Step 3: Cross multiply
   78,685.56x = 108,584.67 × 42,875.85
4. Step 4: Simplify right side
   78,685.56x = 4,655,660,023.22
5. Step 5: Solve for x
   x = 4,655,660,023.22/78,685.56
6. Step 6: Final answer
   x = 59,167.91