Finding the Third Proportional to 3,715.03 and 8,878.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,715.03 : 8,878.78 = 8,878.78 : x
2. Step 2: Convert to fraction form
   3,715.03/8,878.78 = 8,878.78/x
3. Step 3: Cross multiply
   3,715.03x = 8,878.78 × 8,878.78
4. Step 4: Simplify right side
   3,715.03x = 78,832,756.49
5. Step 5: Solve for x
   x = 78,832,756.49/3,715.03
6. Step 6: Final answer
   x = 21,219.94