Finding the Third Proportional to 128,305.50 and 264,792

Step by Step Solution

1. Step 1: Write the proportion equation
   128,305.50 : 264,792 = 264,792 : x
2. Step 2: Convert to fraction form
   128,305.50/264,792 = 264,792/x
3. Step 3: Cross multiply
   128,305.50x = 264,792 × 264,792
4. Step 4: Simplify right side
   128,305.50x = 70,114,803,264
5. Step 5: Solve for x
   x = 70,114,803,264/128,305.50
6. Step 6: Final answer
   x = 546,467.64