Finding the Fourth Proportional to 78,664.06, 108,556.50 and 42,854.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,664.06 : 108,556.50 = 42,854.16 : x
2. Step 2: Convert to fraction form
   78,664.06/108,556.50 = 42,854.16/x
3. Step 3: Cross multiply
   78,664.06x = 108,556.50 × 42,854.16
4. Step 4: Simplify right side
   78,664.06x = 4,652,098,187.83
5. Step 5: Solve for x
   x = 4,652,098,187.83/78,664.06
6. Step 6: Final answer
   x = 59,138.80