Finding the Third Proportional to 7,782 and 12,055.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,782 : 12,055.50 = 12,055.50 : x
2. Step 2: Convert to fraction form
   7,782/12,055.50 = 12,055.50/x
3. Step 3: Cross multiply
   7,782x = 12,055.50 × 12,055.50
4. Step 4: Simplify right side
   7,782x = 145,335,080.25
5. Step 5: Solve for x
   x = 145,335,080.25/7,782
6. Step 6: Final answer
   x = 18,675.80