Finding the Third Proportional to 123,439.50 and 265,610.25

Step by Step Solution

1. Step 1: Write the proportion equation
   123,439.50 : 265,610.25 = 265,610.25 : x
2. Step 2: Convert to fraction form
   123,439.50/265,610.25 = 265,610.25/x
3. Step 3: Cross multiply
   123,439.50x = 265,610.25 × 265,610.25
4. Step 4: Simplify right side
   123,439.50x = 70,548,804,905.06
5. Step 5: Solve for x
   x = 70,548,804,905.06/123,439.50
6. Step 6: Final answer
   x = 571,525.36