Finding the Third Proportional to 123,136.50 and 265,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,136.50 : 265,510.50 = 265,510.50 : x
2. Step 2: Convert to fraction form
   123,136.50/265,510.50 = 265,510.50/x
3. Step 3: Cross multiply
   123,136.50x = 265,510.50 × 265,510.50
4. Step 4: Simplify right side
   123,136.50x = 70,495,825,610.25
5. Step 5: Solve for x
   x = 70,495,825,610.25/123,136.50
6. Step 6: Final answer
   x = 572,501.46