Finding the Fourth Proportional to 1,066.16, 1,472.03 and 667.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.16 : 1,472.03 = 667.99 : x
2. Step 2: Convert to fraction form
   1,066.16/1,472.03 = 667.99/x
3. Step 3: Cross multiply
   1,066.16x = 1,472.03 × 667.99
4. Step 4: Simplify right side
   1,066.16x = 983,301.32
5. Step 5: Solve for x
   x = 983,301.32/1,066.16
6. Step 6: Final answer
   x = 922.28