Finding the Fourth Proportional to 89,730.56, 123,820.42 and 49,434.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89,730.56 : 123,820.42 = 49,434.40 : x
2. Step 2: Convert to fraction form
   89,730.56/123,820.42 = 49,434.40/x
3. Step 3: Cross multiply
   89,730.56x = 123,820.42 × 49,434.40
4. Step 4: Simplify right side
   89,730.56x = 6,120,988,433.36
5. Step 5: Solve for x
   x = 6,120,988,433.36/89,730.56
6. Step 6: Final answer
   x = 68,215.20