Finding the Fourth Proportional to 78,766.18, 108,694.95 and 42,956.89

Step by Step Solution

1. Step 1: Write the proportion equation
   78,766.18 : 108,694.95 = 42,956.89 : x
2. Step 2: Convert to fraction form
   78,766.18/108,694.95 = 42,956.89/x
3. Step 3: Cross multiply
   78,766.18x = 108,694.95 × 42,956.89
4. Step 4: Simplify right side
   78,766.18x = 4,669,197,010.71
5. Step 5: Solve for x
   x = 4,669,197,010.71/78,766.18
6. Step 6: Final answer
   x = 59,279.21