Finding the Third Proportional to 21,047,949 and 31,486,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,047,949 : 31,486,099.50 = 31,486,099.50 : x
2. Step 2: Convert to fraction form
   21,047,949/31,486,099.50 = 31,486,099.50/x
3. Step 3: Cross multiply
   21,047,949x = 31,486,099.50 × 31,486,099.50
4. Step 4: Simplify right side
   21,047,949x = 991,374,461,723,900.25
5. Step 5: Solve for x
   x = 991,374,461,723,900.25/21,047,949
6. Step 6: Final answer
   x = 47,100,763.20