Finding the Third Proportional to 20,551,809.50 and 42,803,860

Step by Step Solution

1. Step 1: Write the proportion equation
   20,551,809.50 : 42,803,860 = 42,803,860 : x
2. Step 2: Convert to fraction form
   20,551,809.50/42,803,860 = 42,803,860/x
3. Step 3: Cross multiply
   20,551,809.50x = 42,803,860 × 42,803,860
4. Step 4: Simplify right side
   20,551,809.50x = 1,832,170,430,899,600
5. Step 5: Solve for x
   x = 1,832,170,430,899,600/20,551,809.50
6. Step 6: Final answer
   x = 89,148,862.09