Finding the Third Proportional to 21,678,778 and 31,919,352

Step by Step Solution

1. Step 1: Write the proportion equation
   21,678,778 : 31,919,352 = 31,919,352 : x
2. Step 2: Convert to fraction form
   21,678,778/31,919,352 = 31,919,352/x
3. Step 3: Cross multiply
   21,678,778x = 31,919,352 × 31,919,352
4. Step 4: Simplify right side
   21,678,778x = 1,018,845,032,099,904
5. Step 5: Solve for x
   x = 1,018,845,032,099,904/21,678,778
6. Step 6: Final answer
   x = 46,997,346.07