Finding the Third Proportional to 12,402 and 25,807.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402 : 25,807.50 = 25,807.50 : x
2. Step 2: Convert to fraction form
   12,402/25,807.50 = 25,807.50/x
3. Step 3: Cross multiply
   12,402x = 25,807.50 × 25,807.50
4. Step 4: Simplify right side
   12,402x = 666,027,056.25
5. Step 5: Solve for x
   x = 666,027,056.25/12,402
6. Step 6: Final answer
   x = 53,703.20