Finding the Fourth Proportional to 89,488.32, 123,429.60 and 55,516.56

Step by Step Solution

1. Step 1: Write the proportion equation
   89,488.32 : 123,429.60 = 55,516.56 : x
2. Step 2: Convert to fraction form
   89,488.32/123,429.60 = 55,516.56/x
3. Step 3: Cross multiply
   89,488.32x = 123,429.60 × 55,516.56
4. Step 4: Simplify right side
   89,488.32x = 6,852,386,794.18
5. Step 5: Solve for x
   x = 6,852,386,794.18/89,488.32
6. Step 6: Final answer
   x = 76,572.97