Finding the Fourth Proportional to 1,066.62, 1,471.60 and 693.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.62 : 1,471.60 = 693.21 : x
2. Step 2: Convert to fraction form
   1,066.62/1,471.60 = 693.21/x
3. Step 3: Cross multiply
   1,066.62x = 1,471.60 × 693.21
4. Step 4: Simplify right side
   1,066.62x = 1,020,127.84
5. Step 5: Solve for x
   x = 1,020,127.84/1,066.62
6. Step 6: Final answer
   x = 956.41