Finding the Fourth Proportional to 9,885.79, 13,641.04 and 5,906.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,885.79 : 13,641.04 = 5,906.06 : x
2. Step 2: Convert to fraction form
   9,885.79/13,641.04 = 5,906.06/x
3. Step 3: Cross multiply
   9,885.79x = 13,641.04 × 5,906.06
4. Step 4: Simplify right side
   9,885.79x = 80,564,732.50
5. Step 5: Solve for x
   x = 80,564,732.50/9,885.79
6. Step 6: Final answer
   x = 8,149.55