Finding the Third Proportional to 9,139,386 and 19,707,019.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139,386 : 19,707,019.50 = 19,707,019.50 : x
2. Step 2: Convert to fraction form
   9,139,386/19,707,019.50 = 19,707,019.50/x
3. Step 3: Cross multiply
   9,139,386x = 19,707,019.50 × 19,707,019.50
4. Step 4: Simplify right side
   9,139,386x = 388,366,617,573,380.25
5. Step 5: Solve for x
   x = 388,366,617,573,380.25/9,139,386
6. Step 6: Final answer
   x = 42,493,731.81