Finding the Fourth Proportional to 3,061.98, 4,592.88 and 870.66

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.98 : 4,592.88 = 870.66 : x
2. Step 2: Convert to fraction form
   3,061.98/4,592.88 = 870.66/x
3. Step 3: Cross multiply
   3,061.98x = 4,592.88 × 870.66
4. Step 4: Simplify right side
   3,061.98x = 3,998,836.90
5. Step 5: Solve for x
   x = 3,998,836.90/3,061.98
6. Step 6: Final answer
   x = 1,305.96