Finding the Third Proportional to 153,510 and 215,866.50

Step by Step Solution

1. Step 1: Write the proportion equation
   153,510 : 215,866.50 = 215,866.50 : x
2. Step 2: Convert to fraction form
   153,510/215,866.50 = 215,866.50/x
3. Step 3: Cross multiply
   153,510x = 215,866.50 × 215,866.50
4. Step 4: Simplify right side
   153,510x = 46,598,345,822.25
5. Step 5: Solve for x
   x = 46,598,345,822.25/153,510
6. Step 6: Final answer
   x = 303,552.51