Finding the Fourth Proportional to 1,569.06, 2,165.04 and 870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,569.06 : 2,165.04 = 870.42 : x
2. Step 2: Convert to fraction form
   1,569.06/2,165.04 = 870.42/x
3. Step 3: Cross multiply
   1,569.06x = 2,165.04 × 870.42
4. Step 4: Simplify right side
   1,569.06x = 1,884,494.12
5. Step 5: Solve for x
   x = 1,884,494.12/1,569.06
6. Step 6: Final answer
   x = 1,201.03