Finding the Fourth Proportional to 78,686.50, 108,587.37 and 43,358.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,686.50 : 108,587.37 = 43,358.50 : x
2. Step 2: Convert to fraction form
   78,686.50/108,587.37 = 43,358.50/x
3. Step 3: Cross multiply
   78,686.50x = 108,587.37 × 43,358.50
4. Step 4: Simplify right side
   78,686.50x = 4,708,185,482.15
5. Step 5: Solve for x
   x = 4,708,185,482.15/78,686.50
6. Step 6: Final answer
   x = 59,834.73