Finding the Fourth Proportional to 89,428.48, 123,413.76 and 49,687.04

Step by Step Solution

1. Step 1: Write the proportion equation
   89,428.48 : 123,413.76 = 49,687.04 : x
2. Step 2: Convert to fraction form
   89,428.48/123,413.76 = 49,687.04/x
3. Step 3: Cross multiply
   89,428.48x = 123,413.76 × 49,687.04
4. Step 4: Simplify right side
   89,428.48x = 6,132,064,429.67
5. Step 5: Solve for x
   x = 6,132,064,429.67/89,428.48
6. Step 6: Final answer
   x = 68,569.48