Finding the Third Proportional to 9,156.16 and 13,672.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,156.16 : 13,672.55 = 13,672.55 : x
2. Step 2: Convert to fraction form
   9,156.16/13,672.55 = 13,672.55/x
3. Step 3: Cross multiply
   9,156.16x = 13,672.55 × 13,672.55
4. Step 4: Simplify right side
   9,156.16x = 186,938,538.05
5. Step 5: Solve for x
   x = 186,938,538.05/9,156.16
6. Step 6: Final answer
   x = 20,416.69