Finding the Fourth Proportional to 100,868.78, 139,068.83 and 82,651.77

Step by Step Solution

1. Step 1: Write the proportion equation
   100,868.78 : 139,068.83 = 82,651.77 : x
2. Step 2: Convert to fraction form
   100,868.78/139,068.83 = 82,651.77/x
3. Step 3: Cross multiply
   100,868.78x = 139,068.83 × 82,651.77
4. Step 4: Simplify right side
   100,868.78x = 11,494,284,538.07
5. Step 5: Solve for x
   x = 11,494,284,538.07/100,868.78
6. Step 6: Final answer
   x = 113,952.85