Finding the Third Proportional to 30,985.75 and 67,123.25

Step by Step Solution

1. Step 1: Write the proportion equation
   30,985.75 : 67,123.25 = 67,123.25 : x
2. Step 2: Convert to fraction form
   30,985.75/67,123.25 = 67,123.25/x
3. Step 3: Cross multiply
   30,985.75x = 67,123.25 × 67,123.25
4. Step 4: Simplify right side
   30,985.75x = 4,505,530,690.56
5. Step 5: Solve for x
   x = 4,505,530,690.56/30,985.75
6. Step 6: Final answer
   x = 145,406.54