Finding the Fourth Proportional to 12,091.27, 16,693.69 and 9,858.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,091.27 : 16,693.69 = 9,858.50 : x
2. Step 2: Convert to fraction form
   12,091.27/16,693.69 = 9,858.50/x
3. Step 3: Cross multiply
   12,091.27x = 16,693.69 × 9,858.50
4. Step 4: Simplify right side
   12,091.27x = 164,574,742.87
5. Step 5: Solve for x
   x = 164,574,742.87/12,091.27
6. Step 6: Final answer
   x = 13,611.04