Finding the Third Proportional to 64,912 and 141,839

Step by Step Solution

1. Step 1: Write the proportion equation
   64,912 : 141,839 = 141,839 : x
2. Step 2: Convert to fraction form
   64,912/141,839 = 141,839/x
3. Step 3: Cross multiply
   64,912x = 141,839 × 141,839
4. Step 4: Simplify right side
   64,912x = 20,118,301,921
5. Step 5: Solve for x
   x = 20,118,301,921/64,912
6. Step 6: Final answer
   x = 309,931.94