Finding the Third Proportional to 191,896 and 287,868

Step by Step Solution

1. Step 1: Write the proportion equation
   191,896 : 287,868 = 287,868 : x
2. Step 2: Convert to fraction form
   191,896/287,868 = 287,868/x
3. Step 3: Cross multiply
   191,896x = 287,868 × 287,868
4. Step 4: Simplify right side
   191,896x = 82,867,985,424
5. Step 5: Solve for x
   x = 82,867,985,424/191,896
6. Step 6: Final answer
   x = 431,838.00