Finding the Fourth Proportional to 215,612.31, 323,060.93 and 131,116.89

Step by Step Solution

1. Step 1: Write the proportion equation
   215,612.31 : 323,060.93 = 131,116.89 : x
2. Step 2: Convert to fraction form
   215,612.31/323,060.93 = 131,116.89/x
3. Step 3: Cross multiply
   215,612.31x = 323,060.93 × 131,116.89
4. Step 4: Simplify right side
   215,612.31x = 42,358,743,538.42
5. Step 5: Solve for x
   x = 42,358,743,538.42/215,612.31
6. Step 6: Final answer
   x = 196,457.91