Finding the Fourth Proportional to 143,813.31, 215,817.17 and 50,319.87

Step by Step Solution

1. Step 1: Write the proportion equation
   143,813.31 : 215,817.17 = 50,319.87 : x
2. Step 2: Convert to fraction form
   143,813.31/215,817.17 = 50,319.87/x
3. Step 3: Cross multiply
   143,813.31x = 215,817.17 × 50,319.87
4. Step 4: Simplify right side
   143,813.31x = 10,859,891,686.57
5. Step 5: Solve for x
   x = 10,859,891,686.57/143,813.31
6. Step 6: Final answer
   x = 75,513.82