Finding the Third Proportional to 9,145 and 13,392.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,145 : 13,392.50 = 13,392.50 : x
2. Step 2: Convert to fraction form
   9,145/13,392.50 = 13,392.50/x
3. Step 3: Cross multiply
   9,145x = 13,392.50 × 13,392.50
4. Step 4: Simplify right side
   9,145x = 179,359,056.25
5. Step 5: Solve for x
   x = 179,359,056.25/9,145
6. Step 6: Final answer
   x = 19,612.80