Finding the Fourth Proportional to 143,411.58, 215,131.43 and 52,251.77

Step by Step Solution

1. Step 1: Write the proportion equation
   143,411.58 : 215,131.43 = 52,251.77 : x
2. Step 2: Convert to fraction form
   143,411.58/215,131.43 = 52,251.77/x
3. Step 3: Cross multiply
   143,411.58x = 215,131.43 × 52,251.77
4. Step 4: Simplify right side
   143,411.58x = 11,240,997,665.90
5. Step 5: Solve for x
   x = 11,240,997,665.90/143,411.58
6. Step 6: Final answer
   x = 78,382.77