Finding the Third Proportional to 7,663.36 and 11,870.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,663.36 : 11,870.30 = 11,870.30 : x
2. Step 2: Convert to fraction form
   7,663.36/11,870.30 = 11,870.30/x
3. Step 3: Cross multiply
   7,663.36x = 11,870.30 × 11,870.30
4. Step 4: Simplify right side
   7,663.36x = 140,903,947.90
5. Step 5: Solve for x
   x = 140,903,947.90/7,663.36
6. Step 6: Final answer
   x = 18,386.71