Finding the Third Proportional to 13,419.56 and 19,666.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,419.56 : 19,666.69 = 19,666.69 : x
2. Step 2: Convert to fraction form
   13,419.56/19,666.69 = 19,666.69/x
3. Step 3: Cross multiply
   13,419.56x = 19,666.69 × 19,666.69
4. Step 4: Simplify right side
   13,419.56x = 386,778,597.22
5. Step 5: Solve for x
   x = 386,778,597.22/13,419.56
6. Step 6: Final answer
   x = 28,822.00