Finding the Fourth Proportional to 88,081.37, 121,642.40 and 82,438.91

Step by Step Solution

1. Step 1: Write the proportion equation
   88,081.37 : 121,642.40 = 82,438.91 : x
2. Step 2: Convert to fraction form
   88,081.37/121,642.40 = 82,438.91/x
3. Step 3: Cross multiply
   88,081.37x = 121,642.40 × 82,438.91
4. Step 4: Simplify right side
   88,081.37x = 10,028,066,865.78
5. Step 5: Solve for x
   x = 10,028,066,865.78/88,081.37
6. Step 6: Final answer
   x = 113,850.03