Finding the Fourth Proportional to 2,556.81, 3,834.78 and 707.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.81 : 3,834.78 = 707.49 : x
2. Step 2: Convert to fraction form
   2,556.81/3,834.78 = 707.49/x
3. Step 3: Cross multiply
   2,556.81x = 3,834.78 × 707.49
4. Step 4: Simplify right side
   2,556.81x = 2,713,068.50
5. Step 5: Solve for x
   x = 2,713,068.50/2,556.81
6. Step 6: Final answer
   x = 1,061.11