Finding the Fourth Proportional to 1,398.24, 1,932.48 and 1,066.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.24 : 1,932.48 = 1,066.68 : x
2. Step 2: Convert to fraction form
   1,398.24/1,932.48 = 1,066.68/x
3. Step 3: Cross multiply
   1,398.24x = 1,932.48 × 1,066.68
4. Step 4: Simplify right side
   1,398.24x = 2,061,337.77
5. Step 5: Solve for x
   x = 2,061,337.77/1,398.24
6. Step 6: Final answer
   x = 1,474.24