Finding the Fourth Proportional to 231,143.10, 318,953.71 and 158,608.20

Step by Step Solution

1. Step 1: Write the proportion equation
   231,143.10 : 318,953.71 = 158,608.20 : x
2. Step 2: Convert to fraction form
   231,143.10/318,953.71 = 158,608.20/x
3. Step 3: Cross multiply
   231,143.10x = 318,953.71 × 158,608.20
4. Step 4: Simplify right side
   231,143.10x = 50,588,673,826.42
5. Step 5: Solve for x
   x = 50,588,673,826.42/231,143.10
6. Step 6: Final answer
   x = 218,863.01