Finding the Fourth Proportional to 1,665.37, 2,298.49 and 1,591.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.37 : 2,298.49 = 1,591.56 : x
2. Step 2: Convert to fraction form
   1,665.37/2,298.49 = 1,591.56/x
3. Step 3: Cross multiply
   1,665.37x = 2,298.49 × 1,591.56
4. Step 4: Simplify right side
   1,665.37x = 3,658,173.25
5. Step 5: Solve for x
   x = 3,658,173.25/1,665.37
6. Step 6: Final answer
   x = 2,196.61