Finding the Third Proportional to 121,500 and 249,012

Step by Step Solution

1. Step 1: Write the proportion equation
   121,500 : 249,012 = 249,012 : x
2. Step 2: Convert to fraction form
   121,500/249,012 = 249,012/x
3. Step 3: Cross multiply
   121,500x = 249,012 × 249,012
4. Step 4: Simplify right side
   121,500x = 62,006,976,144
5. Step 5: Solve for x
   x = 62,006,976,144/121,500
6. Step 6: Final answer
   x = 510,345.48