Finding the Fourth Proportional to 78,776.16, 108,708.72 and 42,966.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,776.16 : 108,708.72 = 42,966.72 : x
2. Step 2: Convert to fraction form
   78,776.16/108,708.72 = 42,966.72/x
3. Step 3: Cross multiply
   78,776.16x = 108,708.72 × 42,966.72
4. Step 4: Simplify right side
   78,776.16x = 4,670,857,133.80
5. Step 5: Solve for x
   x = 4,670,857,133.80/78,776.16
6. Step 6: Final answer
   x = 59,292.78