Finding the Fourth Proportional to 1,802.72, 2,704.56 and 762.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,802.72 : 2,704.56 = 762.20 : x
2. Step 2: Convert to fraction form
   1,802.72/2,704.56 = 762.20/x
3. Step 3: Cross multiply
   1,802.72x = 2,704.56 × 762.20
4. Step 4: Simplify right side
   1,802.72x = 2,061,415.63
5. Step 5: Solve for x
   x = 2,061,415.63/1,802.72
6. Step 6: Final answer
   x = 1,143.50