Finding the Fourth Proportional to 11,934.21, 16,470.72 and 7,218.48

Step by Step Solution

1. Step 1: Write the proportion equation
   11,934.21 : 16,470.72 = 7,218.48 : x
2. Step 2: Convert to fraction form
   11,934.21/16,470.72 = 7,218.48/x
3. Step 3: Cross multiply
   11,934.21x = 16,470.72 × 7,218.48
4. Step 4: Simplify right side
   11,934.21x = 118,893,562.91
5. Step 5: Solve for x
   x = 118,893,562.91/11,934.21
6. Step 6: Final answer
   x = 9,962.42