Finding the Fourth Proportional to 116,574.76, 160,921.92 and 78,870.88

Step by Step Solution

1. Step 1: Write the proportion equation
   116,574.76 : 160,921.92 = 78,870.88 : x
2. Step 2: Convert to fraction form
   116,574.76/160,921.92 = 78,870.88/x
3. Step 3: Cross multiply
   116,574.76x = 160,921.92 × 78,870.88
4. Step 4: Simplify right side
   116,574.76x = 12,692,053,441.69
5. Step 5: Solve for x
   x = 12,692,053,441.69/116,574.76
6. Step 6: Final answer
   x = 108,874.80