Finding the Fourth Proportional to 2,112.89, 3,165.21 and 1,417.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.89 : 3,165.21 = 1,417.64 : x
2. Step 2: Convert to fraction form
   2,112.89/3,165.21 = 1,417.64/x
3. Step 3: Cross multiply
   2,112.89x = 3,165.21 × 1,417.64
4. Step 4: Simplify right side
   2,112.89x = 4,487,112.48
5. Step 5: Solve for x
   x = 4,487,112.48/2,112.89
6. Step 6: Final answer
   x = 2,123.69