Finding the Fourth Proportional to 1,344.71, 1,856.17 and 813.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,344.71 : 1,856.17 = 813.62 : x
2. Step 2: Convert to fraction form
   1,344.71/1,856.17 = 813.62/x
3. Step 3: Cross multiply
   1,344.71x = 1,856.17 × 813.62
4. Step 4: Simplify right side
   1,344.71x = 1,510,207.75
5. Step 5: Solve for x
   x = 1,510,207.75/1,344.71
6. Step 6: Final answer
   x = 1,123.08