Finding the Fourth Proportional to 89,411.71, 123,336.84 and 55,819.39

Step by Step Solution

1. Step 1: Write the proportion equation
   89,411.71 : 123,336.84 = 55,819.39 : x
2. Step 2: Convert to fraction form
   89,411.71/123,336.84 = 55,819.39/x
3. Step 3: Cross multiply
   89,411.71x = 123,336.84 × 55,819.39
4. Step 4: Simplify right side
   89,411.71x = 6,884,587,173.33
5. Step 5: Solve for x
   x = 6,884,587,173.33/89,411.71
6. Step 6: Final answer
   x = 76,998.72