Finding the Third Proportional to 28,867.50 and 63,400.50

Step by Step Solution

1. Step 1: Write the proportion equation
   28,867.50 : 63,400.50 = 63,400.50 : x
2. Step 2: Convert to fraction form
   28,867.50/63,400.50 = 63,400.50/x
3. Step 3: Cross multiply
   28,867.50x = 63,400.50 × 63,400.50
4. Step 4: Simplify right side
   28,867.50x = 4,019,623,400.25
5. Step 5: Solve for x
   x = 4,019,623,400.25/28,867.50
6. Step 6: Final answer
   x = 139,243.90