Finding the Fourth Proportional to 1,492.21, 2,239.71 and 762.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,492.21 : 2,239.71 = 762.31 : x
2. Step 2: Convert to fraction form
   1,492.21/2,239.71 = 762.31/x
3. Step 3: Cross multiply
   1,492.21x = 2,239.71 × 762.31
4. Step 4: Simplify right side
   1,492.21x = 1,707,353.33
5. Step 5: Solve for x
   x = 1,707,353.33/1,492.21
6. Step 6: Final answer
   x = 1,144.18