Finding the Fourth Proportional to 2,174.42, 3,002.17 and 1,389.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,174.42 : 3,002.17 = 1,389.52 : x
2. Step 2: Convert to fraction form
   2,174.42/3,002.17 = 1,389.52/x
3. Step 3: Cross multiply
   2,174.42x = 3,002.17 × 1,389.52
4. Step 4: Simplify right side
   2,174.42x = 4,171,575.26
5. Step 5: Solve for x
   x = 4,171,575.26/2,174.42
6. Step 6: Final answer
   x = 1,918.48