Finding the Fourth Proportional to 1,665.84, 2,278.88 and 1,658.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.84 : 2,278.88 = 1,658.82 : x
2. Step 2: Convert to fraction form
   1,665.84/2,278.88 = 1,658.82/x
3. Step 3: Cross multiply
   1,665.84x = 2,278.88 × 1,658.82
4. Step 4: Simplify right side
   1,665.84x = 3,780,255.87
5. Step 5: Solve for x
   x = 3,780,255.87/1,665.84
6. Step 6: Final answer
   x = 2,269.28