Finding the Fourth Proportional to 100,867.15, 139,066.59 and 82,650.15

Step by Step Solution

1. Step 1: Write the proportion equation
   100,867.15 : 139,066.59 = 82,650.15 : x
2. Step 2: Convert to fraction form
   100,867.15/139,066.59 = 82,650.15/x
3. Step 3: Cross multiply
   100,867.15x = 139,066.59 × 82,650.15
4. Step 4: Simplify right side
   100,867.15x = 11,493,874,523.49
5. Step 5: Solve for x
   x = 11,493,874,523.49/100,867.15
6. Step 6: Final answer
   x = 113,950.62