Finding the Fourth Proportional to 9,135.84, 12,608.03 and 5,155.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,135.84 : 12,608.03 = 5,155.50 : x
2. Step 2: Convert to fraction form
   9,135.84/12,608.03 = 5,155.50/x
3. Step 3: Cross multiply
   9,135.84x = 12,608.03 × 5,155.50
4. Step 4: Simplify right side
   9,135.84x = 65,000,672.89
5. Step 5: Solve for x
   x = 65,000,672.89/9,135.84
6. Step 6: Final answer
   x = 7,114.91