Finding the Third Proportional to 12,499.31 and 20,503.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.31 : 20,503.13 = 20,503.13 : x
2. Step 2: Convert to fraction form
   12,499.31/20,503.13 = 20,503.13/x
3. Step 3: Cross multiply
   12,499.31x = 20,503.13 × 20,503.13
4. Step 4: Simplify right side
   12,499.31x = 420,378,134.77
5. Step 5: Solve for x
   x = 420,378,134.77/12,499.31
6. Step 6: Final answer
   x = 33,632.10