Finding the Fourth Proportional to 12,300.72, 18,410.40 and 9,363.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.72 : 18,410.40 = 9,363.12 : x
2. Step 2: Convert to fraction form
   12,300.72/18,410.40 = 9,363.12/x
3. Step 3: Cross multiply
   12,300.72x = 18,410.40 × 9,363.12
4. Step 4: Simplify right side
   12,300.72x = 172,378,784.45
5. Step 5: Solve for x
   x = 172,378,784.45/12,300.72
6. Step 6: Final answer
   x = 14,013.72