Finding the Fourth Proportional to 89,411.70, 123,336.84 and 55,819.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89,411.70 : 123,336.84 = 55,819.38 : x
2. Step 2: Convert to fraction form
   89,411.70/123,336.84 = 55,819.38/x
3. Step 3: Cross multiply
   89,411.70x = 123,336.84 × 55,819.38
4. Step 4: Simplify right side
   89,411.70x = 6,884,585,939.96
5. Step 5: Solve for x
   x = 6,884,585,939.96/89,411.70
6. Step 6: Final answer
   x = 76,998.71