Finding the Third Proportional to 7,779.38 and 12,368.81

Step by Step Solution

1. Step 1: Write the proportion equation
   7,779.38 : 12,368.81 = 12,368.81 : x
2. Step 2: Convert to fraction form
   7,779.38/12,368.81 = 12,368.81/x
3. Step 3: Cross multiply
   7,779.38x = 12,368.81 × 12,368.81
4. Step 4: Simplify right side
   7,779.38x = 152,987,522.66
5. Step 5: Solve for x
   x = 152,987,522.66/7,779.38
6. Step 6: Final answer
   x = 19,665.79