Finding the Fourth Proportional to 21,234.56, 31,853.86 and 7,197.15

Step by Step Solution

1. Step 1: Write the proportion equation
   21,234.56 : 31,853.86 = 7,197.15 : x
2. Step 2: Convert to fraction form
   21,234.56/31,853.86 = 7,197.15/x
3. Step 3: Cross multiply
   21,234.56x = 31,853.86 × 7,197.15
4. Step 4: Simplify right side
   21,234.56x = 229,257,109.96
5. Step 5: Solve for x
   x = 229,257,109.96/21,234.56
6. Step 6: Final answer
   x = 10,796.42