Finding the Fourth Proportional to 2,209.16, 3,313.72 and 1,051.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.16 : 3,313.72 = 1,051.40 : x
2. Step 2: Convert to fraction form
   2,209.16/3,313.72 = 1,051.40/x
3. Step 3: Cross multiply
   2,209.16x = 3,313.72 × 1,051.40
4. Step 4: Simplify right side
   2,209.16x = 3,484,045.21
5. Step 5: Solve for x
   x = 3,484,045.21/2,209.16
6. Step 6: Final answer
   x = 1,577.09