Finding the Fourth Proportional to 12,200.72, 16,837.06 and 6,611.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.72 : 16,837.06 = 6,611.72 : x
2. Step 2: Convert to fraction form
   12,200.72/16,837.06 = 6,611.72/x
3. Step 3: Cross multiply
   12,200.72x = 16,837.06 × 6,611.72
4. Step 4: Simplify right side
   12,200.72x = 111,321,926.34
5. Step 5: Solve for x
   x = 111,321,926.34/12,200.72
6. Step 6: Final answer
   x = 9,124.21