Finding the Fourth Proportional to 143,815.31, 215,820.17 and 50,321.87

Step by Step Solution

1. Step 1: Write the proportion equation
   143,815.31 : 215,820.17 = 50,321.87 : x
2. Step 2: Convert to fraction form
   143,815.31/215,820.17 = 50,321.87/x
3. Step 3: Cross multiply
   143,815.31x = 215,820.17 × 50,321.87
4. Step 4: Simplify right side
   143,815.31x = 10,860,474,538.12
5. Step 5: Solve for x
   x = 10,860,474,538.12/143,815.31
6. Step 6: Final answer
   x = 75,516.82