Finding the Fourth Proportional to 1,569.83, 2,166.38 and 980.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,569.83 : 2,166.38 = 980.71 : x
2. Step 2: Convert to fraction form
   1,569.83/2,166.38 = 980.71/x
3. Step 3: Cross multiply
   1,569.83x = 2,166.38 × 980.71
4. Step 4: Simplify right side
   1,569.83x = 2,124,590.53
5. Step 5: Solve for x
   x = 2,124,590.53/1,569.83
6. Step 6: Final answer
   x = 1,353.39