Finding the Fourth Proportional to 83,431.89, 115,131.24 and 49,443.57

Step by Step Solution

1. Step 1: Write the proportion equation
   83,431.89 : 115,131.24 = 49,443.57 : x
2. Step 2: Convert to fraction form
   83,431.89/115,131.24 = 49,443.57/x
3. Step 3: Cross multiply
   83,431.89x = 115,131.24 × 49,443.57
4. Step 4: Simplify right side
   83,431.89x = 5,692,499,524.13
5. Step 5: Solve for x
   x = 5,692,499,524.13/83,431.89
6. Step 6: Final answer
   x = 68,229.30