Finding the Fourth Proportional to 89,160.30, 123,053.81 and 55,179.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89,160.30 : 123,053.81 = 55,179.72 : x
2. Step 2: Convert to fraction form
   89,160.30/123,053.81 = 55,179.72/x
3. Step 3: Cross multiply
   89,160.30x = 123,053.81 × 55,179.72
4. Step 4: Simplify right side
   89,160.30x = 6,790,074,780.73
5. Step 5: Solve for x
   x = 6,790,074,780.73/89,160.30
6. Step 6: Final answer
   x = 76,155.81