Finding the Fourth Proportional to 1,499.64, 2,069.96 and 870.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.64 : 2,069.96 = 870.32 : x
2. Step 2: Convert to fraction form
   1,499.64/2,069.96 = 870.32/x
3. Step 3: Cross multiply
   1,499.64x = 2,069.96 × 870.32
4. Step 4: Simplify right side
   1,499.64x = 1,801,528.41
5. Step 5: Solve for x
   x = 1,801,528.41/1,499.64
6. Step 6: Final answer
   x = 1,201.31