Finding the Fourth Proportional to 1,344.84, 1,856.70 and 1,066.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,344.84 : 1,856.70 = 1,066.20 : x
2. Step 2: Convert to fraction form
   1,344.84/1,856.70 = 1,066.20/x
3. Step 3: Cross multiply
   1,344.84x = 1,856.70 × 1,066.20
4. Step 4: Simplify right side
   1,344.84x = 1,979,613.54
5. Step 5: Solve for x
   x = 1,979,613.54/1,344.84
6. Step 6: Final answer
   x = 1,472.01