Finding the Fourth Proportional to 78,957.30, 108,956.42 and 43,140.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,957.30 : 108,956.42 = 43,140.18 : x
2. Step 2: Convert to fraction form
   78,957.30/108,956.42 = 43,140.18/x
3. Step 3: Cross multiply
   78,957.30x = 108,956.42 × 43,140.18
4. Step 4: Simplify right side
   78,957.30x = 4,700,399,570.96
5. Step 5: Solve for x
   x = 4,700,399,570.96/78,957.30
6. Step 6: Final answer
   x = 59,530.91