Finding the Fourth Proportional to 2,147.31, 3,221.20 and 760.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.31 : 3,221.20 = 760.62 : x
2. Step 2: Convert to fraction form
   2,147.31/3,221.20 = 760.62/x
3. Step 3: Cross multiply
   2,147.31x = 3,221.20 × 760.62
4. Step 4: Simplify right side
   2,147.31x = 2,450,122.17
5. Step 5: Solve for x
   x = 2,450,122.17/2,147.31
6. Step 6: Final answer
   x = 1,141.02