Finding the Fourth Proportional to 9,136.53, 12,608.33 and 5,157.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,136.53 : 12,608.33 = 5,157.50 : x
2. Step 2: Convert to fraction form
   9,136.53/12,608.33 = 5,157.50/x
3. Step 3: Cross multiply
   9,136.53x = 12,608.33 × 5,157.50
4. Step 4: Simplify right side
   9,136.53x = 65,027,373.15
5. Step 5: Solve for x
   x = 65,027,373.15/9,136.53
6. Step 6: Final answer
   x = 7,117.29