Finding the Fourth Proportional to 89,718.88, 123,810.45 and 49,436.37

Step by Step Solution

1. Step 1: Write the proportion equation
   89,718.88 : 123,810.45 = 49,436.37 : x
2. Step 2: Convert to fraction form
   89,718.88/123,810.45 = 49,436.37/x
3. Step 3: Cross multiply
   89,718.88x = 123,810.45 × 49,436.37
4. Step 4: Simplify right side
   89,718.88x = 6,120,739,216.07
5. Step 5: Solve for x
   x = 6,120,739,216.07/89,718.88
6. Step 6: Final answer
   x = 68,221.31