Finding the Fourth Proportional to 2,898.90, 3,998.22 and 2,105.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,898.90 : 3,998.22 = 2,105.16 : x
2. Step 2: Convert to fraction form
   2,898.90/3,998.22 = 2,105.16/x
3. Step 3: Cross multiply
   2,898.90x = 3,998.22 × 2,105.16
4. Step 4: Simplify right side
   2,898.90x = 8,416,892.82
5. Step 5: Solve for x
   x = 8,416,892.82/2,898.90
6. Step 6: Final answer
   x = 2,903.48