Finding the Third Proportional to 10,840,981.50 and 21,407,787

Step by Step Solution

1. Step 1: Write the proportion equation
   10,840,981.50 : 21,407,787 = 21,407,787 : x
2. Step 2: Convert to fraction form
   10,840,981.50/21,407,787 = 21,407,787/x
3. Step 3: Cross multiply
   10,840,981.50x = 21,407,787 × 21,407,787
4. Step 4: Simplify right side
   10,840,981.50x = 458,293,344,237,369
5. Step 5: Solve for x
   x = 458,293,344,237,369/10,840,981.50
6. Step 6: Final answer
   x = 42,274,156.10