Finding the Fourth Proportional to 3,061.99, 4,592.89 and 870.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.99 : 4,592.89 = 870.72 : x
2. Step 2: Convert to fraction form
   3,061.99/4,592.89 = 870.72/x
3. Step 3: Cross multiply
   3,061.99x = 4,592.89 × 870.72
4. Step 4: Simplify right side
   3,061.99x = 3,999,121.18
5. Step 5: Solve for x
   x = 3,999,121.18/3,061.99
6. Step 6: Final answer
   x = 1,306.05