Finding the Fourth Proportional to 2,665.56, 3,997.38 and 910.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.56 : 3,997.38 = 910.22 : x
2. Step 2: Convert to fraction form
   2,665.56/3,997.38 = 910.22/x
3. Step 3: Cross multiply
   2,665.56x = 3,997.38 × 910.22
4. Step 4: Simplify right side
   2,665.56x = 3,638,495.22
5. Step 5: Solve for x
   x = 3,638,495.22/2,665.56
6. Step 6: Final answer
   x = 1,365.00