Finding the Third Proportional to 13,318.88 and 19,886.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,318.88 : 19,886.63 = 19,886.63 : x
2. Step 2: Convert to fraction form
   13,318.88/19,886.63 = 19,886.63/x
3. Step 3: Cross multiply
   13,318.88x = 19,886.63 × 19,886.63
4. Step 4: Simplify right side
   13,318.88x = 395,477,853.89
5. Step 5: Solve for x
   x = 395,477,853.89/13,318.88
6. Step 6: Final answer
   x = 29,693.04