Finding the Fourth Proportional to 9,155.54, 12,633.63 and 5,122.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,155.54 : 12,633.63 = 5,122.55 : x
2. Step 2: Convert to fraction form
   9,155.54/12,633.63 = 5,122.55/x
3. Step 3: Cross multiply
   9,155.54x = 12,633.63 × 5,122.55
4. Step 4: Simplify right side
   9,155.54x = 64,716,401.36
5. Step 5: Solve for x
   x = 64,716,401.36/9,155.54
6. Step 6: Final answer
   x = 7,068.55