Finding the Fourth Proportional to 1,665.09, 2,298.60 and 1,266.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.09 : 2,298.60 = 1,266.90 : x
2. Step 2: Convert to fraction form
   1,665.09/2,298.60 = 1,266.90/x
3. Step 3: Cross multiply
   1,665.09x = 2,298.60 × 1,266.90
4. Step 4: Simplify right side
   1,665.09x = 2,912,096.34
5. Step 5: Solve for x
   x = 2,912,096.34/1,665.09
6. Step 6: Final answer
   x = 1,748.91