Finding the Fourth Proportional to 89,978.88, 124,171.78 and 49,693.64

Step by Step Solution

1. Step 1: Write the proportion equation
   89,978.88 : 124,171.78 = 49,693.64 : x
2. Step 2: Convert to fraction form
   89,978.88/124,171.78 = 49,693.64/x
3. Step 3: Cross multiply
   89,978.88x = 124,171.78 × 49,693.64
4. Step 4: Simplify right side
   89,978.88x = 6,170,547,733.48
5. Step 5: Solve for x
   x = 6,170,547,733.48/89,978.88
6. Step 6: Final answer
   x = 68,577.73