Finding the Fourth Proportional to 2,101.18, 2,900.13 and 1,217.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.18 : 2,900.13 = 1,217.47 : x
2. Step 2: Convert to fraction form
   2,101.18/2,900.13 = 1,217.47/x
3. Step 3: Cross multiply
   2,101.18x = 2,900.13 × 1,217.47
4. Step 4: Simplify right side
   2,101.18x = 3,530,821.27
5. Step 5: Solve for x
   x = 3,530,821.27/2,101.18
6. Step 6: Final answer
   x = 1,680.40