Finding the Fourth Proportional to 1,530.28, 2,293.86 and 870.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.28 : 2,293.86 = 870.79 : x
2. Step 2: Convert to fraction form
   1,530.28/2,293.86 = 870.79/x
3. Step 3: Cross multiply
   1,530.28x = 2,293.86 × 870.79
4. Step 4: Simplify right side
   1,530.28x = 1,997,470.35
5. Step 5: Solve for x
   x = 1,997,470.35/1,530.28
6. Step 6: Final answer
   x = 1,305.30