Finding the Fourth Proportional to 3,440.31, 5,158.71 and 2,345.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,440.31 : 5,158.71 = 2,345.91 : x
2. Step 2: Convert to fraction form
   3,440.31/5,158.71 = 2,345.91/x
3. Step 3: Cross multiply
   3,440.31x = 5,158.71 × 2,345.91
4. Step 4: Simplify right side
   3,440.31x = 12,101,869.38
5. Step 5: Solve for x
   x = 12,101,869.38/3,440.31
6. Step 6: Final answer
   x = 3,517.67