Finding the Fourth Proportional to 2,665.02, 3,997.82 and 910.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.02 : 3,997.82 = 910.20 : x
2. Step 2: Convert to fraction form
   2,665.02/3,997.82 = 910.20/x
3. Step 3: Cross multiply
   2,665.02x = 3,997.82 × 910.20
4. Step 4: Simplify right side
   2,665.02x = 3,638,815.76
5. Step 5: Solve for x
   x = 3,638,815.76/2,665.02
6. Step 6: Final answer
   x = 1,365.40