Finding the Fourth Proportional to 1,499.37, 2,069.38 and 870.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.37 : 2,069.38 = 870.09 : x
2. Step 2: Convert to fraction form
   1,499.37/2,069.38 = 870.09/x
3. Step 3: Cross multiply
   1,499.37x = 2,069.38 × 870.09
4. Step 4: Simplify right side
   1,499.37x = 1,800,547.93
5. Step 5: Solve for x
   x = 1,800,547.93/1,499.37
6. Step 6: Final answer
   x = 1,200.87