Finding the Fourth Proportional to 1,492.37, 2,235.31 and 721.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,492.37 : 2,235.31 = 721.25 : x
2. Step 2: Convert to fraction form
   1,492.37/2,235.31 = 721.25/x
3. Step 3: Cross multiply
   1,492.37x = 2,235.31 × 721.25
4. Step 4: Simplify right side
   1,492.37x = 1,612,217.34
5. Step 5: Solve for x
   x = 1,612,217.34/1,492.37
6. Step 6: Final answer
   x = 1,080.31