Finding the Fourth Proportional to 900.72, 1,349.31 and 802.76

Step by Step Solution

1. Step 1: Write the proportion equation
   900.72 : 1,349.31 = 802.76 : x
2. Step 2: Convert to fraction form
   900.72/1,349.31 = 802.76/x
3. Step 3: Cross multiply
   900.72x = 1,349.31 × 802.76
4. Step 4: Simplify right side
   900.72x = 1,083,172.10
5. Step 5: Solve for x
   x = 1,083,172.10/900.72
6. Step 6: Final answer
   x = 1,202.56