Finding the Third Proportional to 31,398,513 and 42,408,840

Step by Step Solution

1. Step 1: Write the proportion equation
   31,398,513 : 42,408,840 = 42,408,840 : x
2. Step 2: Convert to fraction form
   31,398,513/42,408,840 = 42,408,840/x
3. Step 3: Cross multiply
   31,398,513x = 42,408,840 × 42,408,840
4. Step 4: Simplify right side
   31,398,513x = 1,798,509,710,145,600
5. Step 5: Solve for x
   x = 1,798,509,710,145,600/31,398,513
6. Step 6: Final answer
   x = 57,280,091.90