Finding the Fourth Proportional to 2,182.90, 3,012.57 and 1,238.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,182.90 : 3,012.57 = 1,238.86 : x
2. Step 2: Convert to fraction form
   2,182.90/3,012.57 = 1,238.86/x
3. Step 3: Cross multiply
   2,182.90x = 3,012.57 × 1,238.86
4. Step 4: Simplify right side
   2,182.90x = 3,732,131.21
5. Step 5: Solve for x
   x = 3,732,131.21/2,182.90
6. Step 6: Final answer
   x = 1,709.71