Finding the Fourth Proportional to 16,643.61, 24,971.90 and 7,885.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,643.61 : 24,971.90 = 7,885.89 : x
2. Step 2: Convert to fraction form
   16,643.61/24,971.90 = 7,885.89/x
3. Step 3: Cross multiply
   16,643.61x = 24,971.90 × 7,885.89
4. Step 4: Simplify right side
   16,643.61x = 196,925,617.06
5. Step 5: Solve for x
   x = 196,925,617.06/16,643.61
6. Step 6: Final answer
   x = 11,831.91