Finding the Third Proportional to 30,478.78 and 65,453.06

Step by Step Solution

1. Step 1: Write the proportion equation
   30,478.78 : 65,453.06 = 65,453.06 : x
2. Step 2: Convert to fraction form
   30,478.78/65,453.06 = 65,453.06/x
3. Step 3: Cross multiply
   30,478.78x = 65,453.06 × 65,453.06
4. Step 4: Simplify right side
   30,478.78x = 4,284,103,390.63
5. Step 5: Solve for x
   x = 4,284,103,390.63/30,478.78
6. Step 6: Final answer
   x = 140,560.19