Finding the Fourth Proportional to 1,004.65, 1,499.62 and 928.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.65 : 1,499.62 = 928.10 : x
2. Step 2: Convert to fraction form
   1,004.65/1,499.62 = 928.10/x
3. Step 3: Cross multiply
   1,004.65x = 1,499.62 × 928.10
4. Step 4: Simplify right side
   1,004.65x = 1,391,797.32
5. Step 5: Solve for x
   x = 1,391,797.32/1,004.65
6. Step 6: Final answer
   x = 1,385.36