Finding the Fourth Proportional to 89,820.48, 123,942.72 and 49,531.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,820.48 : 123,942.72 = 49,531.60 : x
2. Step 2: Convert to fraction form
   89,820.48/123,942.72 = 49,531.60/x
3. Step 3: Cross multiply
   89,820.48x = 123,942.72 × 49,531.60
4. Step 4: Simplify right side
   89,820.48x = 6,139,081,229.95
5. Step 5: Solve for x
   x = 6,139,081,229.95/89,820.48
6. Step 6: Final answer
   x = 68,348.35