Finding the Third Proportional to 121,606.50 and 249,228

Step by Step Solution

1. Step 1: Write the proportion equation
   121,606.50 : 249,228 = 249,228 : x
2. Step 2: Convert to fraction form
   121,606.50/249,228 = 249,228/x
3. Step 3: Cross multiply
   121,606.50x = 249,228 × 249,228
4. Step 4: Simplify right side
   121,606.50x = 62,114,595,984
5. Step 5: Solve for x
   x = 62,114,595,984/121,606.50
6. Step 6: Final answer
   x = 510,783.52