Finding the Fourth Proportional to 89,471.71, 123,471.21 and 49,189.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,471.71 : 123,471.21 = 49,189.60 : x
2. Step 2: Convert to fraction form
   89,471.71/123,471.21 = 49,189.60/x
3. Step 3: Cross multiply
   89,471.71x = 123,471.21 × 49,189.60
4. Step 4: Simplify right side
   89,471.71x = 6,073,499,431.42
5. Step 5: Solve for x
   x = 6,073,499,431.42/89,471.71
6. Step 6: Final answer
   x = 67,881.79