Finding the Third Proportional to 7,861.50 and 12,066.75

Step by Step Solution

1. Step 1: Write the proportion equation
   7,861.50 : 12,066.75 = 12,066.75 : x
2. Step 2: Convert to fraction form
   7,861.50/12,066.75 = 12,066.75/x
3. Step 3: Cross multiply
   7,861.50x = 12,066.75 × 12,066.75
4. Step 4: Simplify right side
   7,861.50x = 145,606,455.56
5. Step 5: Solve for x
   x = 145,606,455.56/7,861.50
6. Step 6: Final answer
   x = 18,521.46