Finding the Fourth Proportional to 2,607.71, 3,911.56 and 1,069.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.71 : 3,911.56 = 1,069.79 : x
2. Step 2: Convert to fraction form
   2,607.71/3,911.56 = 1,069.79/x
3. Step 3: Cross multiply
   2,607.71x = 3,911.56 × 1,069.79
4. Step 4: Simplify right side
   2,607.71x = 4,184,547.77
5. Step 5: Solve for x
   x = 4,184,547.77/2,607.71
6. Step 6: Final answer
   x = 1,604.68