Finding the Fourth Proportional to 1,499.52, 2,069.20 and 870.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.52 : 2,069.20 = 870.16 : x
2. Step 2: Convert to fraction form
   1,499.52/2,069.20 = 870.16/x
3. Step 3: Cross multiply
   1,499.52x = 2,069.20 × 870.16
4. Step 4: Simplify right side
   1,499.52x = 1,800,535.07
5. Step 5: Solve for x
   x = 1,800,535.07/1,499.52
6. Step 6: Final answer
   x = 1,200.74