Finding the Fourth Proportional to 1,563.32, 2,343.38 and 870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.32 : 2,343.38 = 870.30 : x
2. Step 2: Convert to fraction form
   1,563.32/2,343.38 = 870.30/x
3. Step 3: Cross multiply
   1,563.32x = 2,343.38 × 870.30
4. Step 4: Simplify right side
   1,563.32x = 2,039,443.61
5. Step 5: Solve for x
   x = 2,039,443.61/1,563.32
6. Step 6: Final answer
   x = 1,304.56