Finding the Third Proportional to 340,590 and 515,601.50

Step by Step Solution

1. Step 1: Write the proportion equation
   340,590 : 515,601.50 = 515,601.50 : x
2. Step 2: Convert to fraction form
   340,590/515,601.50 = 515,601.50/x
3. Step 3: Cross multiply
   340,590x = 515,601.50 × 515,601.50
4. Step 4: Simplify right side
   340,590x = 265,844,906,802.25
5. Step 5: Solve for x
   x = 265,844,906,802.25/340,590
6. Step 6: Final answer
   x = 780,542.31