Finding the Third Proportional to 123,158.50 and 265,309

Step by Step Solution

1. Step 1: Write the proportion equation
   123,158.50 : 265,309 = 265,309 : x
2. Step 2: Convert to fraction form
   123,158.50/265,309 = 265,309/x
3. Step 3: Cross multiply
   123,158.50x = 265,309 × 265,309
4. Step 4: Simplify right side
   123,158.50x = 70,388,865,481
5. Step 5: Solve for x
   x = 70,388,865,481/123,158.50
6. Step 6: Final answer
   x = 571,530.71