Finding the Fourth Proportional to 1,088.28, 1,501.47 and 668.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,088.28 : 1,501.47 = 668.42 : x
2. Step 2: Convert to fraction form
   1,088.28/1,501.47 = 668.42/x
3. Step 3: Cross multiply
   1,088.28x = 1,501.47 × 668.42
4. Step 4: Simplify right side
   1,088.28x = 1,003,612.58
5. Step 5: Solve for x
   x = 1,003,612.58/1,088.28
6. Step 6: Final answer
   x = 922.20