Finding the Third Proportional to 61,978.50 and 134,257.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,978.50 : 134,257.50 = 134,257.50 : x
2. Step 2: Convert to fraction form
   61,978.50/134,257.50 = 134,257.50/x
3. Step 3: Cross multiply
   61,978.50x = 134,257.50 × 134,257.50
4. Step 4: Simplify right side
   61,978.50x = 18,025,076,306.25
5. Step 5: Solve for x
   x = 18,025,076,306.25/61,978.50
6. Step 6: Final answer
   x = 290,827.89