Finding the Third Proportional to 9,151,234 and 19,720,860

Step by Step Solution

1. Step 1: Write the proportion equation
   9,151,234 : 19,720,860 = 19,720,860 : x
2. Step 2: Convert to fraction form
   9,151,234/19,720,860 = 19,720,860/x
3. Step 3: Cross multiply
   9,151,234x = 19,720,860 × 19,720,860
4. Step 4: Simplify right side
   9,151,234x = 388,912,319,139,600
5. Step 5: Solve for x
   x = 388,912,319,139,600/9,151,234
6. Step 6: Final answer
   x = 42,498,347.12