Finding the Fourth Proportional to 101,255.90, 139,628.46 and 86,963.05

Step by Step Solution

1. Step 1: Write the proportion equation
   101,255.90 : 139,628.46 = 86,963.05 : x
2. Step 2: Convert to fraction form
   101,255.90/139,628.46 = 86,963.05/x
3. Step 3: Cross multiply
   101,255.90x = 139,628.46 × 86,963.05
4. Step 4: Simplify right side
   101,255.90x = 12,142,517,249.05
5. Step 5: Solve for x
   x = 12,142,517,249.05/101,255.90
6. Step 6: Final answer
   x = 119,919.11