Finding the Fourth Proportional to 8,913.89, 12,302.47 and 5,136.33

Step by Step Solution

1. Step 1: Write the proportion equation
   8,913.89 : 12,302.47 = 5,136.33 : x
2. Step 2: Convert to fraction form
   8,913.89/12,302.47 = 5,136.33/x
3. Step 3: Cross multiply
   8,913.89x = 12,302.47 × 5,136.33
4. Step 4: Simplify right side
   8,913.89x = 63,189,598.29
5. Step 5: Solve for x
   x = 63,189,598.29/8,913.89
6. Step 6: Final answer
   x = 7,088.89