Finding the Third Proportional to 121,230 and 249,925.50

Step by Step Solution

1. Step 1: Write the proportion equation
   121,230 : 249,925.50 = 249,925.50 : x
2. Step 2: Convert to fraction form
   121,230/249,925.50 = 249,925.50/x
3. Step 3: Cross multiply
   121,230x = 249,925.50 × 249,925.50
4. Step 4: Simplify right side
   121,230x = 62,462,755,550.25
5. Step 5: Solve for x
   x = 62,462,755,550.25/121,230
6. Step 6: Final answer
   x = 515,241.74