Finding the Third Proportional to 30,499.88 and 64,280.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,499.88 : 64,280.25 = 64,280.25 : x
2. Step 2: Convert to fraction form
   30,499.88/64,280.25 = 64,280.25/x
3. Step 3: Cross multiply
   30,499.88x = 64,280.25 × 64,280.25
4. Step 4: Simplify right side
   30,499.88x = 4,131,950,540.06
5. Step 5: Solve for x
   x = 4,131,950,540.06/30,499.88
6. Step 6: Final answer
   x = 135,474.34