Finding the Third Proportional to 318,335 and 477,502.50

Step by Step Solution

1. Step 1: Write the proportion equation
   318,335 : 477,502.50 = 477,502.50 : x
2. Step 2: Convert to fraction form
   318,335/477,502.50 = 477,502.50/x
3. Step 3: Cross multiply
   318,335x = 477,502.50 × 477,502.50
4. Step 4: Simplify right side
   318,335x = 228,008,637,506.25
5. Step 5: Solve for x
   x = 228,008,637,506.25/318,335
6. Step 6: Final answer
   x = 716,253.75