Finding the Fourth Proportional to 1,066.48, 1,471.54 and 646.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.48 : 1,471.54 = 646.72 : x
2. Step 2: Convert to fraction form
   1,066.48/1,471.54 = 646.72/x
3. Step 3: Cross multiply
   1,066.48x = 1,471.54 × 646.72
4. Step 4: Simplify right side
   1,066.48x = 951,674.35
5. Step 5: Solve for x
   x = 951,674.35/1,066.48
6. Step 6: Final answer
   x = 892.35