Finding the Fourth Proportional to 3,061.53, 4,592.57 and 870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.53 : 4,592.57 = 870.30 : x
2. Step 2: Convert to fraction form
   3,061.53/4,592.57 = 870.30/x
3. Step 3: Cross multiply
   3,061.53x = 4,592.57 × 870.30
4. Step 4: Simplify right side
   3,061.53x = 3,996,909.32
5. Step 5: Solve for x
   x = 3,996,909.32/3,061.53
6. Step 6: Final answer
   x = 1,305.53