Finding the Fourth Proportional to 89,840.91, 123,978.28 and 49,553.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89,840.91 : 123,978.28 = 49,553.80 : x
2. Step 2: Convert to fraction form
   89,840.91/123,978.28 = 49,553.80/x
3. Step 3: Cross multiply
   89,840.91x = 123,978.28 × 49,553.80
4. Step 4: Simplify right side
   89,840.91x = 6,143,594,860.61
5. Step 5: Solve for x
   x = 6,143,594,860.61/89,840.91
6. Step 6: Final answer
   x = 68,383.05