Finding the Fourth Proportional to 1,583.25, 2,177.60 and 1,386.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,583.25 : 2,177.60 = 1,386.42 : x
2. Step 2: Convert to fraction form
   1,583.25/2,177.60 = 1,386.42/x
3. Step 3: Cross multiply
   1,583.25x = 2,177.60 × 1,386.42
4. Step 4: Simplify right side
   1,583.25x = 3,019,061.26
5. Step 5: Solve for x
   x = 3,019,061.26/1,583.25
6. Step 6: Final answer
   x = 1,906.88