Finding the Third Proportional to 10,840,991.50 and 21,407,807

Step by Step Solution

1. Step 1: Write the proportion equation
   10,840,991.50 : 21,407,807 = 21,407,807 : x
2. Step 2: Convert to fraction form
   10,840,991.50/21,407,807 = 21,407,807/x
3. Step 3: Cross multiply
   10,840,991.50x = 21,407,807 × 21,407,807
4. Step 4: Simplify right side
   10,840,991.50x = 458,294,200,549,249
5. Step 5: Solve for x
   x = 458,294,200,549,249/10,840,991.50
6. Step 6: Final answer
   x = 42,274,196.10