Finding the Fourth Proportional to 89,640.15, 123,702.39 and 49,353.09

Step by Step Solution

1. Step 1: Write the proportion equation
   89,640.15 : 123,702.39 = 49,353.09 : x
2. Step 2: Convert to fraction form
   89,640.15/123,702.39 = 49,353.09/x
3. Step 3: Cross multiply
   89,640.15x = 123,702.39 × 49,353.09
4. Step 4: Simplify right side
   89,640.15x = 6,105,095,186.89
5. Step 5: Solve for x
   x = 6,105,095,186.89/89,640.15
6. Step 6: Final answer
   x = 68,106.70