Finding the Fourth Proportional to 89,407.32, 123,381.60 and 49,120.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,407.32 : 123,381.60 = 49,120.20 : x
2. Step 2: Convert to fraction form
   89,407.32/123,381.60 = 49,120.20/x
3. Step 3: Cross multiply
   89,407.32x = 123,381.60 × 49,120.20
4. Step 4: Simplify right side
   89,407.32x = 6,060,528,868.32
5. Step 5: Solve for x
   x = 6,060,528,868.32/89,407.32
6. Step 6: Final answer
   x = 67,785.60