Finding the Fourth Proportional to 3,061.80, 4,592.62 and 870.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.80 : 4,592.62 = 870.53 : x
2. Step 2: Convert to fraction form
   3,061.80/4,592.62 = 870.53/x
3. Step 3: Cross multiply
   3,061.80x = 4,592.62 × 870.53
4. Step 4: Simplify right side
   3,061.80x = 3,997,986.17
5. Step 5: Solve for x
   x = 3,997,986.17/3,061.80
6. Step 6: Final answer
   x = 1,305.76