Finding the Third Proportional to 129,726 and 274,828.50

Step by Step Solution

1. Step 1: Write the proportion equation
   129,726 : 274,828.50 = 274,828.50 : x
2. Step 2: Convert to fraction form
   129,726/274,828.50 = 274,828.50/x
3. Step 3: Cross multiply
   129,726x = 274,828.50 × 274,828.50
4. Step 4: Simplify right side
   129,726x = 75,530,704,412.25
5. Step 5: Solve for x
   x = 75,530,704,412.25/129,726
6. Step 6: Final answer
   x = 582,232.59