Finding the Third Proportional to 64,678.50 and 141,381

Step by Step Solution

1. Step 1: Write the proportion equation
   64,678.50 : 141,381 = 141,381 : x
2. Step 2: Convert to fraction form
   64,678.50/141,381 = 141,381/x
3. Step 3: Cross multiply
   64,678.50x = 141,381 × 141,381
4. Step 4: Simplify right side
   64,678.50x = 19,988,587,161
5. Step 5: Solve for x
   x = 19,988,587,161/64,678.50
6. Step 6: Final answer
   x = 309,045.31