Finding the Fourth Proportional to 2,100.21, 2,898.36 and 1,513.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.21 : 2,898.36 = 1,513.23 : x
2. Step 2: Convert to fraction form
   2,100.21/2,898.36 = 1,513.23/x
3. Step 3: Cross multiply
   2,100.21x = 2,898.36 × 1,513.23
4. Step 4: Simplify right side
   2,100.21x = 4,385,885.30
5. Step 5: Solve for x
   x = 4,385,885.30/2,100.21
6. Step 6: Final answer
   x = 2,088.31