Finding the Third Proportional to 9,357 and 12,889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,357 : 12,889.50 = 12,889.50 : x
2. Step 2: Convert to fraction form
   9,357/12,889.50 = 12,889.50/x
3. Step 3: Cross multiply
   9,357x = 12,889.50 × 12,889.50
4. Step 4: Simplify right side
   9,357x = 166,139,210.25
5. Step 5: Solve for x
   x = 166,139,210.25/9,357
6. Step 6: Final answer
   x = 17,755.61