Finding the Fourth Proportional to 3,061.80, 4,592.43 and 870.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.80 : 4,592.43 = 870.48 : x
2. Step 2: Convert to fraction form
   3,061.80/4,592.43 = 870.48/x
3. Step 3: Cross multiply
   3,061.80x = 4,592.43 × 870.48
4. Step 4: Simplify right side
   3,061.80x = 3,997,618.47
5. Step 5: Solve for x
   x = 3,997,618.47/3,061.80
6. Step 6: Final answer
   x = 1,305.64