Finding the Third Proportional to 191,805 and 287,710.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,805 : 287,710.50 = 287,710.50 : x
2. Step 2: Convert to fraction form
   191,805/287,710.50 = 287,710.50/x
3. Step 3: Cross multiply
   191,805x = 287,710.50 × 287,710.50
4. Step 4: Simplify right side
   191,805x = 82,777,331,810.25
5. Step 5: Solve for x
   x = 82,777,331,810.25/191,805
6. Step 6: Final answer
   x = 431,570.25