Finding the Fourth Proportional to 9,138.06, 12,610.83 and 5,552.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,138.06 : 12,610.83 = 5,552.40 : x
2. Step 2: Convert to fraction form
   9,138.06/12,610.83 = 5,552.40/x
3. Step 3: Cross multiply
   9,138.06x = 12,610.83 × 5,552.40
4. Step 4: Simplify right side
   9,138.06x = 70,020,372.49
5. Step 5: Solve for x
   x = 70,020,372.49/9,138.06
6. Step 6: Final answer
   x = 7,662.50