Finding the Fourth Proportional to 1,087.65, 1,501.20 and 668.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.65 : 1,501.20 = 668.01 : x
2. Step 2: Convert to fraction form
   1,087.65/1,501.20 = 668.01/x
3. Step 3: Cross multiply
   1,087.65x = 1,501.20 × 668.01
4. Step 4: Simplify right side
   1,087.65x = 1,002,816.61
5. Step 5: Solve for x
   x = 1,002,816.61/1,087.65
6. Step 6: Final answer
   x = 922.00