Finding the Third Proportional to 369,561 and 514,891.50

Step by Step Solution

1. Step 1: Write the proportion equation
   369,561 : 514,891.50 = 514,891.50 : x
2. Step 2: Convert to fraction form
   369,561/514,891.50 = 514,891.50/x
3. Step 3: Cross multiply
   369,561x = 514,891.50 × 514,891.50
4. Step 4: Simplify right side
   369,561x = 265,113,256,772.25
5. Step 5: Solve for x
   x = 265,113,256,772.25/369,561
6. Step 6: Final answer
   x = 717,373.47