Finding the Fourth Proportional to 89,651.20, 123,719.58 and 49,368.71

Step by Step Solution

1. Step 1: Write the proportion equation
   89,651.20 : 123,719.58 = 49,368.71 : x
2. Step 2: Convert to fraction form
   89,651.20/123,719.58 = 49,368.71/x
3. Step 3: Cross multiply
   89,651.20x = 123,719.58 × 49,368.71
4. Step 4: Simplify right side
   89,651.20x = 6,107,875,200.90
5. Step 5: Solve for x
   x = 6,107,875,200.90/89,651.20
6. Step 6: Final answer
   x = 68,129.32