Finding the Third Proportional to 129,398 and 274,347.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,398 : 274,347.50 = 274,347.50 : x
2. Step 2: Convert to fraction form
   129,398/274,347.50 = 274,347.50/x
3. Step 3: Cross multiply
   129,398x = 274,347.50 × 274,347.50
4. Step 4: Simplify right side
   129,398x = 75,266,550,756.25
5. Step 5: Solve for x
   x = 75,266,550,756.25/129,398
6. Step 6: Final answer
   x = 581,667.03