Finding the Third Proportional to 9,861.75 and 13,815.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.75 : 13,815.56 = 13,815.56 : x
2. Step 2: Convert to fraction form
   9,861.75/13,815.56 = 13,815.56/x
3. Step 3: Cross multiply
   9,861.75x = 13,815.56 × 13,815.56
4. Step 4: Simplify right side
   9,861.75x = 190,869,767.19
5. Step 5: Solve for x
   x = 190,869,767.19/9,861.75
6. Step 6: Final answer
   x = 19,354.55