Finding the Fourth Proportional to 1,343.47, 2,016.57 and 931.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.47 : 2,016.57 = 931.18 : x
2. Step 2: Convert to fraction form
   1,343.47/2,016.57 = 931.18/x
3. Step 3: Cross multiply
   1,343.47x = 2,016.57 × 931.18
4. Step 4: Simplify right side
   1,343.47x = 1,877,789.65
5. Step 5: Solve for x
   x = 1,877,789.65/1,343.47
6. Step 6: Final answer
   x = 1,397.72