Finding the Fourth Proportional to 3,061.91, 4,592.84 and 870.35

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.91 : 4,592.84 = 870.35 : x
2. Step 2: Convert to fraction form
   3,061.91/4,592.84 = 870.35/x
3. Step 3: Cross multiply
   3,061.91x = 4,592.84 × 870.35
4. Step 4: Simplify right side
   3,061.91x = 3,997,388.69
5. Step 5: Solve for x
   x = 3,997,388.69/3,061.91
6. Step 6: Final answer
   x = 1,305.52