Finding the Fourth Proportional to 2,187.38, 3,018.60 and 1,291.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,187.38 : 3,018.60 = 1,291.32 : x
2. Step 2: Convert to fraction form
   2,187.38/3,018.60 = 1,291.32/x
3. Step 3: Cross multiply
   2,187.38x = 3,018.60 × 1,291.32
4. Step 4: Simplify right side
   2,187.38x = 3,897,978.55
5. Step 5: Solve for x
   x = 3,897,978.55/2,187.38
6. Step 6: Final answer
   x = 1,782.03