Finding the Fourth Proportional to 1,066.56, 1,472.14 and 928.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.56 : 1,472.14 = 928.05 : x
2. Step 2: Convert to fraction form
   1,066.56/1,472.14 = 928.05/x
3. Step 3: Cross multiply
   1,066.56x = 1,472.14 × 928.05
4. Step 4: Simplify right side
   1,066.56x = 1,366,212.17
5. Step 5: Solve for x
   x = 1,366,212.17/1,066.56
6. Step 6: Final answer
   x = 1,280.96