Finding the Fourth Proportional to 13,353.50, 18,429.46 and 7,764.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,353.50 : 18,429.46 = 7,764.50 : x
2. Step 2: Convert to fraction form
   13,353.50/18,429.46 = 7,764.50/x
3. Step 3: Cross multiply
   13,353.50x = 18,429.46 × 7,764.50
4. Step 4: Simplify right side
   13,353.50x = 143,095,542.17
5. Step 5: Solve for x
   x = 143,095,542.17/13,353.50
6. Step 6: Final answer
   x = 10,715.96