Finding the Fourth Proportional to 2,111.16, 2,913.12 and 1,226.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.16 : 2,913.12 = 1,226.92 : x
2. Step 2: Convert to fraction form
   2,111.16/2,913.12 = 1,226.92/x
3. Step 3: Cross multiply
   2,111.16x = 2,913.12 × 1,226.92
4. Step 4: Simplify right side
   2,111.16x = 3,574,165.19
5. Step 5: Solve for x
   x = 3,574,165.19/2,111.16
6. Step 6: Final answer
   x = 1,692.99