Finding the Fourth Proportional to 1,340.52, 2,007.52 and 928.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,340.52 : 2,007.52 = 928.50 : x
2. Step 2: Convert to fraction form
   1,340.52/2,007.52 = 928.50/x
3. Step 3: Cross multiply
   1,340.52x = 2,007.52 × 928.50
4. Step 4: Simplify right side
   1,340.52x = 1,863,982.32
5. Step 5: Solve for x
   x = 1,863,982.32/1,340.52
6. Step 6: Final answer
   x = 1,390.49