Finding the Third Proportional to 6,642 and 13,837.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,642 : 13,837.50 = 13,837.50 : x
2. Step 2: Convert to fraction form
   6,642/13,837.50 = 13,837.50/x
3. Step 3: Cross multiply
   6,642x = 13,837.50 × 13,837.50
4. Step 4: Simplify right side
   6,642x = 191,476,406.25
5. Step 5: Solve for x
   x = 191,476,406.25/6,642
6. Step 6: Final answer
   x = 28,828.13