Finding the Fourth Proportional to 2,101.52, 2,899.78 and 1,217.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.52 : 2,899.78 = 1,217.15 : x
2. Step 2: Convert to fraction form
   2,101.52/2,899.78 = 1,217.15/x
3. Step 3: Cross multiply
   2,101.52x = 2,899.78 × 1,217.15
4. Step 4: Simplify right side
   2,101.52x = 3,529,467.23
5. Step 5: Solve for x
   x = 3,529,467.23/2,101.52
6. Step 6: Final answer
   x = 1,679.48