Finding the Third Proportional to 30,897.50 and 67,810.75

Step by Step Solution

1. Step 1: Write the proportion equation
   30,897.50 : 67,810.75 = 67,810.75 : x
2. Step 2: Convert to fraction form
   30,897.50/67,810.75 = 67,810.75/x
3. Step 3: Cross multiply
   30,897.50x = 67,810.75 × 67,810.75
4. Step 4: Simplify right side
   30,897.50x = 4,598,297,815.56
5. Step 5: Solve for x
   x = 4,598,297,815.56/30,897.50
6. Step 6: Final answer
   x = 148,824.27