Finding the Fourth Proportional to 2,112, 3,164.76 and 1,417.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112 : 3,164.76 = 1,417.20 : x
2. Step 2: Convert to fraction form
   2,112/3,164.76 = 1,417.20/x
3. Step 3: Cross multiply
   2,112x = 3,164.76 × 1,417.20
4. Step 4: Simplify right side
   2,112x = 4,485,097.87
5. Step 5: Solve for x
   x = 4,485,097.87/2,112
6. Step 6: Final answer
   x = 2,123.63