Finding the Third Proportional to 127,615.50 and 272,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   127,615.50 : 272,443.50 = 272,443.50 : x
2. Step 2: Convert to fraction form
   127,615.50/272,443.50 = 272,443.50/x
3. Step 3: Cross multiply
   127,615.50x = 272,443.50 × 272,443.50
4. Step 4: Simplify right side
   127,615.50x = 74,225,460,692.25
5. Step 5: Solve for x
   x = 74,225,460,692.25/127,615.50
6. Step 6: Final answer
   x = 581,633.58