Finding the Fourth Proportional to 1,399.42, 2,086.26 and 1,333.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.42 : 2,086.26 = 1,333.82 : x
2. Step 2: Convert to fraction form
   1,399.42/2,086.26 = 1,333.82/x
3. Step 3: Cross multiply
   1,399.42x = 2,086.26 × 1,333.82
4. Step 4: Simplify right side
   1,399.42x = 2,782,695.31
5. Step 5: Solve for x
   x = 2,782,695.31/1,399.42
6. Step 6: Final answer
   x = 1,988.46