Finding the Fourth Proportional to 3,909.98, 5,865.15 and 1,136.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,909.98 : 5,865.15 = 1,136.59 : x
2. Step 2: Convert to fraction form
   3,909.98/5,865.15 = 1,136.59/x
3. Step 3: Cross multiply
   3,909.98x = 5,865.15 × 1,136.59
4. Step 4: Simplify right side
   3,909.98x = 6,666,293.69
5. Step 5: Solve for x
   x = 6,666,293.69/3,909.98
6. Step 6: Final answer
   x = 1,704.94