Finding the Fourth Proportional to 89,632.75, 123,426.42 and 87,643.69

Step by Step Solution

1. Step 1: Write the proportion equation
   89,632.75 : 123,426.42 = 87,643.69 : x
2. Step 2: Convert to fraction form
   89,632.75/123,426.42 = 87,643.69/x
3. Step 3: Cross multiply
   89,632.75x = 123,426.42 × 87,643.69
4. Step 4: Simplify right side
   89,632.75x = 10,817,546,892.29
5. Step 5: Solve for x
   x = 10,817,546,892.29/89,632.75
6. Step 6: Final answer
   x = 120,687.44