Finding the Fourth Proportional to 2,045.72, 3,069.80 and 1,072.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,045.72 : 3,069.80 = 1,072.10 : x
2. Step 2: Convert to fraction form
   2,045.72/3,069.80 = 1,072.10/x
3. Step 3: Cross multiply
   2,045.72x = 3,069.80 × 1,072.10
4. Step 4: Simplify right side
   2,045.72x = 3,291,132.58
5. Step 5: Solve for x
   x = 3,291,132.58/2,045.72
6. Step 6: Final answer
   x = 1,608.79