Finding the Third Proportional to 12,870.25 and 28,200.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,870.25 : 28,200.75 = 28,200.75 : x
2. Step 2: Convert to fraction form
   12,870.25/28,200.75 = 28,200.75/x
3. Step 3: Cross multiply
   12,870.25x = 28,200.75 × 28,200.75
4. Step 4: Simplify right side
   12,870.25x = 795,282,300.56
5. Step 5: Solve for x
   x = 795,282,300.56/12,870.25
6. Step 6: Final answer
   x = 61,792.30