Finding the Third Proportional to 19,388,158 and 28,707,890

Step by Step Solution

1. Step 1: Write the proportion equation
   19,388,158 : 28,707,890 = 28,707,890 : x
2. Step 2: Convert to fraction form
   19,388,158/28,707,890 = 28,707,890/x
3. Step 3: Cross multiply
   19,388,158x = 28,707,890 × 28,707,890
4. Step 4: Simplify right side
   19,388,158x = 824,142,948,252,100
5. Step 5: Solve for x
   x = 824,142,948,252,100/19,388,158
6. Step 6: Final answer
   x = 42,507,542.40