Finding the Fourth Proportional to 1,343.27, 2,014.43 and 521.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,343.27 : 2,014.43 = 521.31 : x
2. Step 2: Convert to fraction form
   1,343.27/2,014.43 = 521.31/x
3. Step 3: Cross multiply
   1,343.27x = 2,014.43 × 521.31
4. Step 4: Simplify right side
   1,343.27x = 1,050,139.90
5. Step 5: Solve for x
   x = 1,050,139.90/1,343.27
6. Step 6: Final answer
   x = 781.78