Finding the Fourth Proportional to 1,601.10, 2,209.59 and 1,069.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,601.10 : 2,209.59 = 1,069.05 : x
2. Step 2: Convert to fraction form
   1,601.10/2,209.59 = 1,069.05/x
3. Step 3: Cross multiply
   1,601.10x = 2,209.59 × 1,069.05
4. Step 4: Simplify right side
   1,601.10x = 2,362,162.19
5. Step 5: Solve for x
   x = 2,362,162.19/1,601.10
6. Step 6: Final answer
   x = 1,475.34