Finding the Third Proportional to 59,172 and 129,400.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,172 : 129,400.50 = 129,400.50 : x
2. Step 2: Convert to fraction form
   59,172/129,400.50 = 129,400.50/x
3. Step 3: Cross multiply
   59,172x = 129,400.50 × 129,400.50
4. Step 4: Simplify right side
   59,172x = 16,744,489,400.25
5. Step 5: Solve for x
   x = 16,744,489,400.25/59,172
6. Step 6: Final answer
   x = 282,979.95