Finding the Third Proportional to 20,878,729 and 31,942,117.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,878,729 : 31,942,117.50 = 31,942,117.50 : x
2. Step 2: Convert to fraction form
   20,878,729/31,942,117.50 = 31,942,117.50/x
3. Step 3: Cross multiply
   20,878,729x = 31,942,117.50 × 31,942,117.50
4. Step 4: Simplify right side
   20,878,729x = 1,020,298,870,383,806.25
5. Step 5: Solve for x
   x = 1,020,298,870,383,806.25/20,878,729
6. Step 6: Final answer
   x = 48,867,863.10