Finding the Fourth Proportional to 89,765.28, 123,870.24 and 49,476.78

Step by Step Solution

1. Step 1: Write the proportion equation
   89,765.28 : 123,870.24 = 49,476.78 : x
2. Step 2: Convert to fraction form
   89,765.28/123,870.24 = 49,476.78/x
3. Step 3: Cross multiply
   89,765.28x = 123,870.24 × 49,476.78
4. Step 4: Simplify right side
   89,765.28x = 6,128,700,613.03
5. Step 5: Solve for x
   x = 6,128,700,613.03/89,765.28
6. Step 6: Final answer
   x = 68,274.73