Finding the Fourth Proportional to 215,613.31, 323,062.43 and 131,117.89

Step by Step Solution

1. Step 1: Write the proportion equation
   215,613.31 : 323,062.43 = 131,117.89 : x
2. Step 2: Convert to fraction form
   215,613.31/323,062.43 = 131,117.89/x
3. Step 3: Cross multiply
   215,613.31x = 323,062.43 × 131,117.89
4. Step 4: Simplify right side
   215,613.31x = 42,359,264,159.87
5. Step 5: Solve for x
   x = 42,359,264,159.87/215,613.31
6. Step 6: Final answer
   x = 196,459.41