Finding the Third Proportional to 20,302,806 and 42,278,642

Step by Step Solution

1. Step 1: Write the proportion equation
   20,302,806 : 42,278,642 = 42,278,642 : x
2. Step 2: Convert to fraction form
   20,302,806/42,278,642 = 42,278,642/x
3. Step 3: Cross multiply
   20,302,806x = 42,278,642 × 42,278,642
4. Step 4: Simplify right side
   20,302,806x = 1,787,483,569,364,164
5. Step 5: Solve for x
   x = 1,787,483,569,364,164/20,302,806
6. Step 6: Final answer
   x = 88,041,208.16