Finding the Fourth Proportional to 3,061.48, 4,592.14 and 870.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,061.48 : 4,592.14 = 870.21 : x
2. Step 2: Convert to fraction form
   3,061.48/4,592.14 = 870.21/x
3. Step 3: Cross multiply
   3,061.48x = 4,592.14 × 870.21
4. Step 4: Simplify right side
   3,061.48x = 3,996,126.15
5. Step 5: Solve for x
   x = 3,996,126.15/3,061.48
6. Step 6: Final answer
   x = 1,305.29