Finding the Third Proportional to 64,642.50 and 137,111.63

Step by Step Solution

1. Step 1: Write the proportion equation
   64,642.50 : 137,111.63 = 137,111.63 : x
2. Step 2: Convert to fraction form
   64,642.50/137,111.63 = 137,111.63/x
3. Step 3: Cross multiply
   64,642.50x = 137,111.63 × 137,111.63
4. Step 4: Simplify right side
   64,642.50x = 18,799,597,710.14
5. Step 5: Solve for x
   x = 18,799,597,710.14/64,642.50
6. Step 6: Final answer
   x = 290,824.11