Finding the Third Proportional to 288,018 and 672,877.50

Step by Step Solution

1. Step 1: Write the proportion equation
   288,018 : 672,877.50 = 672,877.50 : x
2. Step 2: Convert to fraction form
   288,018/672,877.50 = 672,877.50/x
3. Step 3: Cross multiply
   288,018x = 672,877.50 × 672,877.50
4. Step 4: Simplify right side
   288,018x = 452,764,130,006.25
5. Step 5: Solve for x
   x = 452,764,130,006.25/288,018
6. Step 6: Final answer
   x = 1,571,999.42