Finding the Third Proportional to 20,335,428 and 42,343,560

Step by Step Solution

1. Step 1: Write the proportion equation
   20,335,428 : 42,343,560 = 42,343,560 : x
2. Step 2: Convert to fraction form
   20,335,428/42,343,560 = 42,343,560/x
3. Step 3: Cross multiply
   20,335,428x = 42,343,560 × 42,343,560
4. Step 4: Simplify right side
   20,335,428x = 1,792,977,073,473,600
5. Step 5: Solve for x
   x = 1,792,977,073,473,600/20,335,428
6. Step 6: Final answer
   x = 88,170,117.37