Finding the Third Proportional to 122,637 and 256,411.50

Step by Step Solution

1. Step 1: Write the proportion equation
   122,637 : 256,411.50 = 256,411.50 : x
2. Step 2: Convert to fraction form
   122,637/256,411.50 = 256,411.50/x
3. Step 3: Cross multiply
   122,637x = 256,411.50 × 256,411.50
4. Step 4: Simplify right side
   122,637x = 65,746,857,332.25
5. Step 5: Solve for x
   x = 65,746,857,332.25/122,637
6. Step 6: Final answer
   x = 536,109.47