Finding the Fourth Proportional to 2,301.78, 3,172.86 and 2,111.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,301.78 : 3,172.86 = 2,111.10 : x
2. Step 2: Convert to fraction form
   2,301.78/3,172.86 = 2,111.10/x
3. Step 3: Cross multiply
   2,301.78x = 3,172.86 × 2,111.10
4. Step 4: Simplify right side
   2,301.78x = 6,698,224.75
5. Step 5: Solve for x
   x = 6,698,224.75/2,301.78
6. Step 6: Final answer
   x = 2,910.02