Finding the Fourth Proportional to 1,427.30, 2,139.41 and 933.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.30 : 2,139.41 = 933.52 : x
2. Step 2: Convert to fraction form
   1,427.30/2,139.41 = 933.52/x
3. Step 3: Cross multiply
   1,427.30x = 2,139.41 × 933.52
4. Step 4: Simplify right side
   1,427.30x = 1,997,176.67
5. Step 5: Solve for x
   x = 1,997,176.67/1,427.30
6. Step 6: Final answer
   x = 1,399.27