Finding the Third Proportional to 188,910 and 287,875

Step by Step Solution

1. Step 1: Write the proportion equation
   188,910 : 287,875 = 287,875 : x
2. Step 2: Convert to fraction form
   188,910/287,875 = 287,875/x
3. Step 3: Cross multiply
   188,910x = 287,875 × 287,875
4. Step 4: Simplify right side
   188,910x = 82,872,015,625
5. Step 5: Solve for x
   x = 82,872,015,625/188,910
6. Step 6: Final answer
   x = 438,685.17