Finding the Third Proportional to 30,870.75 and 63,859.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,870.75 : 63,859.50 = 63,859.50 : x
2. Step 2: Convert to fraction form
   30,870.75/63,859.50 = 63,859.50/x
3. Step 3: Cross multiply
   30,870.75x = 63,859.50 × 63,859.50
4. Step 4: Simplify right side
   30,870.75x = 4,078,035,740.25
5. Step 5: Solve for x
   x = 4,078,035,740.25/30,870.75
6. Step 6: Final answer
   x = 132,100.31