Finding the Fourth Proportional to 2,900.88, 3,997.42 and 2,102.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,900.88 : 3,997.42 = 2,102.83 : x
2. Step 2: Convert to fraction form
   2,900.88/3,997.42 = 2,102.83/x
3. Step 3: Cross multiply
   2,900.88x = 3,997.42 × 2,102.83
4. Step 4: Simplify right side
   2,900.88x = 8,405,879.45
5. Step 5: Solve for x
   x = 8,405,879.45/2,900.88
6. Step 6: Final answer
   x = 2,897.70