Finding the Third Proportional to 20,158,644 and 31,129,290

Step by Step Solution

1. Step 1: Write the proportion equation
   20,158,644 : 31,129,290 = 31,129,290 : x
2. Step 2: Convert to fraction form
   20,158,644/31,129,290 = 31,129,290/x
3. Step 3: Cross multiply
   20,158,644x = 31,129,290 × 31,129,290
4. Step 4: Simplify right side
   20,158,644x = 969,032,695,904,100
5. Step 5: Solve for x
   x = 969,032,695,904,100/20,158,644
6. Step 6: Final answer
   x = 48,070,331.31