Finding the Fourth Proportional to 2,189.90, 3,023.43 and 1,393.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,189.90 : 3,023.43 = 1,393.67 : x
2. Step 2: Convert to fraction form
   2,189.90/3,023.43 = 1,393.67/x
3. Step 3: Cross multiply
   2,189.90x = 3,023.43 × 1,393.67
4. Step 4: Simplify right side
   2,189.90x = 4,213,666.02
5. Step 5: Solve for x
   x = 4,213,666.02/2,189.90
6. Step 6: Final answer
   x = 1,924.13