Finding the Fourth Proportional to 1,622.90, 2,238.81 and 1,560.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,622.90 : 2,238.81 = 1,560.03 : x
2. Step 2: Convert to fraction form
   1,622.90/2,238.81 = 1,560.03/x
3. Step 3: Cross multiply
   1,622.90x = 2,238.81 × 1,560.03
4. Step 4: Simplify right side
   1,622.90x = 3,492,596.52
5. Step 5: Solve for x
   x = 3,492,596.52/1,622.90
6. Step 6: Final answer
   x = 2,152.07