Finding the Fourth Proportional to 16,485.10, 22,749.30 and 9,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,485.10 : 22,749.30 = 9,411.50 : x
2. Step 2: Convert to fraction form
   16,485.10/22,749.30 = 9,411.50/x
3. Step 3: Cross multiply
   16,485.10x = 22,749.30 × 9,411.50
4. Step 4: Simplify right side
   16,485.10x = 214,105,036.95
5. Step 5: Solve for x
   x = 214,105,036.95/16,485.10
6. Step 6: Final answer
   x = 12,987.79