Finding the Fourth Proportional to 13,053.72, 18,000.51 and 7,747.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,053.72 : 18,000.51 = 7,747.50 : x
2. Step 2: Convert to fraction form
   13,053.72/18,000.51 = 7,747.50/x
3. Step 3: Cross multiply
   13,053.72x = 18,000.51 × 7,747.50
4. Step 4: Simplify right side
   13,053.72x = 139,458,951.23
5. Step 5: Solve for x
   x = 139,458,951.23/13,053.72
6. Step 6: Final answer
   x = 10,683.46