Finding the Fourth Proportional to 12,191.16, 16,824.78 and 9,693.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,191.16 : 16,824.78 = 9,693.88 : x
2. Step 2: Convert to fraction form
   12,191.16/16,824.78 = 9,693.88/x
3. Step 3: Cross multiply
   12,191.16x = 16,824.78 × 9,693.88
4. Step 4: Simplify right side
   12,191.16x = 163,097,398.35
5. Step 5: Solve for x
   x = 163,097,398.35/12,191.16
6. Step 6: Final answer
   x = 13,378.33