Finding the Fourth Proportional to 2,709.72, 4,064.40 and 1,066.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,709.72 : 4,064.40 = 1,066.55 : x
2. Step 2: Convert to fraction form
   2,709.72/4,064.40 = 1,066.55/x
3. Step 3: Cross multiply
   2,709.72x = 4,064.40 × 1,066.55
4. Step 4: Simplify right side
   2,709.72x = 4,334,865.50
5. Step 5: Solve for x
   x = 4,334,865.50/2,709.72
6. Step 6: Final answer
   x = 1,599.75