Finding the Fourth Proportional to 1,569.57, 2,166.09 and 870.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,569.57 : 2,166.09 = 870.93 : x
2. Step 2: Convert to fraction form
   1,569.57/2,166.09 = 870.93/x
3. Step 3: Cross multiply
   1,569.57x = 2,166.09 × 870.93
4. Step 4: Simplify right side
   1,569.57x = 1,886,512.76
5. Step 5: Solve for x
   x = 1,886,512.76/1,569.57
6. Step 6: Final answer
   x = 1,201.93