Finding the Third Proportional to 13,135.78 and 19,839.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,135.78 : 19,839.94 = 19,839.94 : x
2. Step 2: Convert to fraction form
   13,135.78/19,839.94 = 19,839.94/x
3. Step 3: Cross multiply
   13,135.78x = 19,839.94 × 19,839.94
4. Step 4: Simplify right side
   13,135.78x = 393,623,120.00
5. Step 5: Solve for x
   x = 393,623,120.00/13,135.78
6. Step 6: Final answer
   x = 29,965.72