Finding the Third Proportional to 9,499.78 and 13,900.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,499.78 : 13,900.36 = 13,900.36 : x
2. Step 2: Convert to fraction form
   9,499.78/13,900.36 = 13,900.36/x
3. Step 3: Cross multiply
   9,499.78x = 13,900.36 × 13,900.36
4. Step 4: Simplify right side
   9,499.78x = 193,219,990.75
5. Step 5: Solve for x
   x = 193,219,990.75/9,499.78
6. Step 6: Final answer
   x = 20,339.41