Finding the Third Proportional to 308,312 and 672,502.50

Step by Step Solution

1. Step 1: Write the proportion equation
   308,312 : 672,502.50 = 672,502.50 : x
2. Step 2: Convert to fraction form
   308,312/672,502.50 = 672,502.50/x
3. Step 3: Cross multiply
   308,312x = 672,502.50 × 672,502.50
4. Step 4: Simplify right side
   308,312x = 452,259,612,506.25
5. Step 5: Solve for x
   x = 452,259,612,506.25/308,312
6. Step 6: Final answer
   x = 1,466,889.43