Finding the Fourth Proportional to 89,382.40, 123,405.42 and 55,426.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89,382.40 : 123,405.42 = 55,426.96 : x
2. Step 2: Convert to fraction form
   89,382.40/123,405.42 = 55,426.96/x
3. Step 3: Cross multiply
   89,382.40x = 123,405.42 × 55,426.96
4. Step 4: Simplify right side
   89,382.40x = 6,839,987,278.12
5. Step 5: Solve for x
   x = 6,839,987,278.12/89,382.40
6. Step 6: Final answer
   x = 76,524.99