Finding the Fourth Proportional to 1,066.05, 1,471.17 and 646.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.05 : 1,471.17 = 646.48 : x
2. Step 2: Convert to fraction form
   1,066.05/1,471.17 = 646.48/x
3. Step 3: Cross multiply
   1,066.05x = 1,471.17 × 646.48
4. Step 4: Simplify right side
   1,066.05x = 951,081.98
5. Step 5: Solve for x
   x = 951,081.98/1,066.05
6. Step 6: Final answer
   x = 892.16