Finding the Fourth Proportional to 78,656.88, 108,471 and 53,166.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,656.88 : 108,471 = 53,166.96 : x
2. Step 2: Convert to fraction form
   78,656.88/108,471 = 53,166.96/x
3. Step 3: Cross multiply
   78,656.88x = 108,471 × 53,166.96
4. Step 4: Simplify right side
   78,656.88x = 5,767,073,318.16
5. Step 5: Solve for x
   x = 5,767,073,318.16/78,656.88
6. Step 6: Final answer
   x = 73,319.38