Finding the Fourth Proportional to 13,150.28, 18,149.73 and 7,772.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,150.28 : 18,149.73 = 7,772.50 : x
2. Step 2: Convert to fraction form
   13,150.28/18,149.73 = 7,772.50/x
3. Step 3: Cross multiply
   13,150.28x = 18,149.73 × 7,772.50
4. Step 4: Simplify right side
   13,150.28x = 141,068,776.43
5. Step 5: Solve for x
   x = 141,068,776.43/13,150.28
6. Step 6: Final answer
   x = 10,727.44