Finding the Fourth Proportional to 2,085.40, 3,115.40 and 1,622.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.40 : 3,115.40 = 1,622.08 : x
2. Step 2: Convert to fraction form
   2,085.40/3,115.40 = 1,622.08/x
3. Step 3: Cross multiply
   2,085.40x = 3,115.40 × 1,622.08
4. Step 4: Simplify right side
   2,085.40x = 5,053,428.03
5. Step 5: Solve for x
   x = 5,053,428.03/2,085.40
6. Step 6: Final answer
   x = 2,423.24