Finding the Fourth Proportional to 9,136.79, 12,611.46 and 5,360.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,136.79 : 12,611.46 = 5,360.77 : x
2. Step 2: Convert to fraction form
   9,136.79/12,611.46 = 5,360.77/x
3. Step 3: Cross multiply
   9,136.79x = 12,611.46 × 5,360.77
4. Step 4: Simplify right side
   9,136.79x = 67,607,136.42
5. Step 5: Solve for x
   x = 67,607,136.42/9,136.79
6. Step 6: Final answer
   x = 7,399.44