Finding the Fourth Proportional to 1,420.52, 2,131.25 and 727.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,420.52 : 2,131.25 = 727.37 : x
2. Step 2: Convert to fraction form
   1,420.52/2,131.25 = 727.37/x
3. Step 3: Cross multiply
   1,420.52x = 2,131.25 × 727.37
4. Step 4: Simplify right side
   1,420.52x = 1,550,207.31
5. Step 5: Solve for x
   x = 1,550,207.31/1,420.52
6. Step 6: Final answer
   x = 1,091.30