Finding the Third Proportional to 64,978.88 and 141,621.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,978.88 : 141,621.75 = 141,621.75 : x
2. Step 2: Convert to fraction form
   64,978.88/141,621.75 = 141,621.75/x
3. Step 3: Cross multiply
   64,978.88x = 141,621.75 × 141,621.75
4. Step 4: Simplify right side
   64,978.88x = 20,056,720,073.06
5. Step 5: Solve for x
   x = 20,056,720,073.06/64,978.88
6. Step 6: Final answer
   x = 308,665.24