Finding the Third Proportional to 200,779.50 and 372,831

Step by Step Solution

1. Step 1: Write the proportion equation
   200,779.50 : 372,831 = 372,831 : x
2. Step 2: Convert to fraction form
   200,779.50/372,831 = 372,831/x
3. Step 3: Cross multiply
   200,779.50x = 372,831 × 372,831
4. Step 4: Simplify right side
   200,779.50x = 139,002,954,561
5. Step 5: Solve for x
   x = 139,002,954,561/200,779.50
6. Step 6: Final answer
   x = 692,316.47