Finding the Fourth Proportional to 1,665.17, 2,297.94 and 909.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.17 : 2,297.94 = 909.01 : x
2. Step 2: Convert to fraction form
   1,665.17/2,297.94 = 909.01/x
3. Step 3: Cross multiply
   1,665.17x = 2,297.94 × 909.01
4. Step 4: Simplify right side
   1,665.17x = 2,088,836.98
5. Step 5: Solve for x
   x = 2,088,836.98/1,665.17
6. Step 6: Final answer
   x = 1,254.43