Finding the Third Proportional to 20,613,009.75 and 42,921,560.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,613,009.75 : 42,921,560.25 = 42,921,560.25 : x
2. Step 2: Convert to fraction form
   20,613,009.75/42,921,560.25 = 42,921,560.25/x
3. Step 3: Cross multiply
   20,613,009.75x = 42,921,560.25 × 42,921,560.25
4. Step 4: Simplify right side
   20,613,009.75x = 1,842,260,334,294,380
5. Step 5: Solve for x
   x = 1,842,260,334,294,380/20,613,009.75
6. Step 6: Final answer
   x = 89,373,670.15