Finding the Fourth Proportional to 1,530.43, 2,294.05 and 870.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.43 : 2,294.05 = 870.89 : x
2. Step 2: Convert to fraction form
   1,530.43/2,294.05 = 870.89/x
3. Step 3: Cross multiply
   1,530.43x = 2,294.05 × 870.89
4. Step 4: Simplify right side
   1,530.43x = 1,997,865.20
5. Step 5: Solve for x
   x = 1,997,865.20/1,530.43
6. Step 6: Final answer
   x = 1,305.43