Finding the Third Proportional to 191,898 and 287,869.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,898 : 287,869.50 = 287,869.50 : x
2. Step 2: Convert to fraction form
   191,898/287,869.50 = 287,869.50/x
3. Step 3: Cross multiply
   191,898x = 287,869.50 × 287,869.50
4. Step 4: Simplify right side
   191,898x = 82,868,849,030.25
5. Step 5: Solve for x
   x = 82,868,849,030.25/191,898
6. Step 6: Final answer
   x = 431,838.00