Finding the Fourth Proportional to 1,344.15, 1,854.72 and 784.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,344.15 : 1,854.72 = 784.71 : x
2. Step 2: Convert to fraction form
   1,344.15/1,854.72 = 784.71/x
3. Step 3: Cross multiply
   1,344.15x = 1,854.72 × 784.71
4. Step 4: Simplify right side
   1,344.15x = 1,455,417.33
5. Step 5: Solve for x
   x = 1,455,417.33/1,344.15
6. Step 6: Final answer
   x = 1,082.78