Finding the Fourth Proportional to 13,153.50, 18,152.38 and 7,564.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,153.50 : 18,152.38 = 7,564.50 : x
2. Step 2: Convert to fraction form
   13,153.50/18,152.38 = 7,564.50/x
3. Step 3: Cross multiply
   13,153.50x = 18,152.38 × 7,564.50
4. Step 4: Simplify right side
   13,153.50x = 137,313,678.51
5. Step 5: Solve for x
   x = 137,313,678.51/13,153.50
6. Step 6: Final answer
   x = 10,439.33