Finding the Fourth Proportional to 2,101.04, 2,899.71 and 1,217.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.04 : 2,899.71 = 1,217.12 : x
2. Step 2: Convert to fraction form
   2,101.04/2,899.71 = 1,217.12/x
3. Step 3: Cross multiply
   2,101.04x = 2,899.71 × 1,217.12
4. Step 4: Simplify right side
   2,101.04x = 3,529,295.04
5. Step 5: Solve for x
   x = 3,529,295.04/2,101.04
6. Step 6: Final answer
   x = 1,679.78