Finding the Fourth Proportional to 9,136.35, 12,608.28 and 5,157.45

Step by Step Solution

1. Step 1: Write the proportion equation
   9,136.35 : 12,608.28 = 5,157.45 : x
2. Step 2: Convert to fraction form
   9,136.35/12,608.28 = 5,157.45/x
3. Step 3: Cross multiply
   9,136.35x = 12,608.28 × 5,157.45
4. Step 4: Simplify right side
   9,136.35x = 65,026,573.69
5. Step 5: Solve for x
   x = 65,026,573.69/9,136.35
6. Step 6: Final answer
   x = 7,117.35