Finding the Third Proportional to 153,028.50 and 215,116.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,028.50 : 215,116.50 = 215,116.50 : x
2. Step 2: Convert to fraction form
   153,028.50/215,116.50 = 215,116.50/x
3. Step 3: Cross multiply
   153,028.50x = 215,116.50 × 215,116.50
4. Step 4: Simplify right side
   153,028.50x = 46,275,108,572.25
5. Step 5: Solve for x
   x = 46,275,108,572.25/153,028.50
6. Step 6: Final answer
   x = 302,395.36