Finding the Fourth Proportional to 2,191.16, 3,021.08 and 1,907.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.16 : 3,021.08 = 1,907.15 : x
2. Step 2: Convert to fraction form
   2,191.16/3,021.08 = 1,907.15/x
3. Step 3: Cross multiply
   2,191.16x = 3,021.08 × 1,907.15
4. Step 4: Simplify right side
   2,191.16x = 5,761,652.72
5. Step 5: Solve for x
   x = 5,761,652.72/2,191.16
6. Step 6: Final answer
   x = 2,629.50