Finding the Fourth Proportional to 2,069.47, 2,855.86 and 1,173.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.47 : 2,855.86 = 1,173.21 : x
2. Step 2: Convert to fraction form
   2,069.47/2,855.86 = 1,173.21/x
3. Step 3: Cross multiply
   2,069.47x = 2,855.86 × 1,173.21
4. Step 4: Simplify right side
   2,069.47x = 3,350,509.87
5. Step 5: Solve for x
   x = 3,350,509.87/2,069.47
6. Step 6: Final answer
   x = 1,619.02