Finding the Third Proportional to 30,649.50 and 69,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,649.50 : 69,421.50 = 69,421.50 : x
2. Step 2: Convert to fraction form
   30,649.50/69,421.50 = 69,421.50/x
3. Step 3: Cross multiply
   30,649.50x = 69,421.50 × 69,421.50
4. Step 4: Simplify right side
   30,649.50x = 4,819,344,662.25
5. Step 5: Solve for x
   x = 4,819,344,662.25/30,649.50
6. Step 6: Final answer
   x = 157,240.56