Finding the Fourth Proportional to 83,890.32, 115,761.69 and 49,429.68

Step by Step Solution

1. Step 1: Write the proportion equation
   83,890.32 : 115,761.69 = 49,429.68 : x
2. Step 2: Convert to fraction form
   83,890.32/115,761.69 = 49,429.68/x
3. Step 3: Cross multiply
   83,890.32x = 115,761.69 × 49,429.68
4. Step 4: Simplify right side
   83,890.32x = 5,722,063,292.96
5. Step 5: Solve for x
   x = 5,722,063,292.96/83,890.32
6. Step 6: Final answer
   x = 68,208.86