Finding the Fourth Proportional to 2,168.99, 3,254.91 and 870.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.99 : 3,254.91 = 870.56 : x
2. Step 2: Convert to fraction form
   2,168.99/3,254.91 = 870.56/x
3. Step 3: Cross multiply
   2,168.99x = 3,254.91 × 870.56
4. Step 4: Simplify right side
   2,168.99x = 2,833,602.59
5. Step 5: Solve for x
   x = 2,833,602.59/2,168.99
6. Step 6: Final answer
   x = 1,306.41