Finding the Fourth Proportional to 3,061.57, 4,592.64 and 870.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.57 : 4,592.64 = 870.34 : x
2. Step 2: Convert to fraction form
   3,061.57/4,592.64 = 870.34/x
3. Step 3: Cross multiply
   3,061.57x = 4,592.64 × 870.34
4. Step 4: Simplify right side
   3,061.57x = 3,997,158.30
5. Step 5: Solve for x
   x = 3,997,158.30/3,061.57
6. Step 6: Final answer
   x = 1,305.59