Finding the Third Proportional to 191,886 and 287,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,886 : 287,851.50 = 287,851.50 : x
2. Step 2: Convert to fraction form
   191,886/287,851.50 = 287,851.50/x
3. Step 3: Cross multiply
   191,886x = 287,851.50 × 287,851.50
4. Step 4: Simplify right side
   191,886x = 82,858,486,052.25
5. Step 5: Solve for x
   x = 82,858,486,052.25/191,886
6. Step 6: Final answer
   x = 431,811.00