Finding the Fourth Proportional to 143,863.59, 215,826.55 and 55,117.10

Step by Step Solution

1. Step 1: Write the proportion equation
   143,863.59 : 215,826.55 = 55,117.10 : x
2. Step 2: Convert to fraction form
   143,863.59/215,826.55 = 55,117.10/x
3. Step 3: Cross multiply
   143,863.59x = 215,826.55 × 55,117.10
4. Step 4: Simplify right side
   143,863.59x = 11,895,733,940.78
5. Step 5: Solve for x
   x = 11,895,733,940.78/143,863.59
6. Step 6: Final answer
   x = 82,687.59