Finding the Third Proportional to 251,118.50 and 378,942

Step by Step Solution

1. Step 1: Write the proportion equation
   251,118.50 : 378,942 = 378,942 : x
2. Step 2: Convert to fraction form
   251,118.50/378,942 = 378,942/x
3. Step 3: Cross multiply
   251,118.50x = 378,942 × 378,942
4. Step 4: Simplify right side
   251,118.50x = 143,597,039,364
5. Step 5: Solve for x
   x = 143,597,039,364/251,118.50
6. Step 6: Final answer
   x = 571,829.79