Finding the Fourth Proportional to 2,989.90, 4,123.74 and 2,654.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,989.90 : 4,123.74 = 2,654.16 : x
2. Step 2: Convert to fraction form
   2,989.90/4,123.74 = 2,654.16/x
3. Step 3: Cross multiply
   2,989.90x = 4,123.74 × 2,654.16
4. Step 4: Simplify right side
   2,989.90x = 10,945,045.32
5. Step 5: Solve for x
   x = 10,945,045.32/2,989.90
6. Step 6: Final answer
   x = 3,660.67