Finding the Fourth Proportional to 13,172.50, 18,178.59 and 7,583.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,172.50 : 18,178.59 = 7,583.50 : x
2. Step 2: Convert to fraction form
   13,172.50/18,178.59 = 7,583.50/x
3. Step 3: Cross multiply
   13,172.50x = 18,178.59 × 7,583.50
4. Step 4: Simplify right side
   13,172.50x = 137,857,337.27
5. Step 5: Solve for x
   x = 137,857,337.27/13,172.50
6. Step 6: Final answer
   x = 10,465.54