Finding the Third Proportional to 31,398,499.88 and 42,408,821.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,398,499.88 : 42,408,821.63 = 42,408,821.63 : x
2. Step 2: Convert to fraction form
   31,398,499.88/42,408,821.63 = 42,408,821.63/x
3. Step 3: Cross multiply
   31,398,499.88x = 42,408,821.63 × 42,408,821.63
4. Step 4: Simplify right side
   31,398,499.88x = 1,798,508,151,621,067.75
5. Step 5: Solve for x
   x = 1,798,508,151,621,067.75/31,398,499.88
6. Step 6: Final answer
   x = 57,280,066.21