Finding the Third Proportional to 30,858,750 and 42,031,057.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,858,750 : 42,031,057.50 = 42,031,057.50 : x
2. Step 2: Convert to fraction form
   30,858,750/42,031,057.50 = 42,031,057.50/x
3. Step 3: Cross multiply
   30,858,750x = 42,031,057.50 × 42,031,057.50
4. Step 4: Simplify right side
   30,858,750x = 1,766,609,794,568,306.25
5. Step 5: Solve for x
   x = 1,766,609,794,568,306.25/30,858,750
6. Step 6: Final answer
   x = 57,248,261.66