Finding the Fourth Proportional to 89,478.72, 123,480.88 and 49,196.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,478.72 : 123,480.88 = 49,196.60 : x
2. Step 2: Convert to fraction form
   89,478.72/123,480.88 = 49,196.60/x
3. Step 3: Cross multiply
   89,478.72x = 123,480.88 × 49,196.60
4. Step 4: Simplify right side
   89,478.72x = 6,074,839,461.01
5. Step 5: Solve for x
   x = 6,074,839,461.01/89,478.72
6. Step 6: Final answer
   x = 67,891.44