Finding the Fourth Proportional to 78,664.96, 108,557.16 and 42,854.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,664.96 : 108,557.16 = 42,854.88 : x
2. Step 2: Convert to fraction form
   78,664.96/108,557.16 = 42,854.88/x
3. Step 3: Cross multiply
   78,664.96x = 108,557.16 × 42,854.88
4. Step 4: Simplify right side
   78,664.96x = 4,652,204,064.94
5. Step 5: Solve for x
   x = 4,652,204,064.94/78,664.96
6. Step 6: Final answer
   x = 59,139.47