Finding the Third Proportional to 191,781 and 403,780.50

Step by Step Solution

1. Step 1: Write the proportion equation
   191,781 : 403,780.50 = 403,780.50 : x
2. Step 2: Convert to fraction form
   191,781/403,780.50 = 403,780.50/x
3. Step 3: Cross multiply
   191,781x = 403,780.50 × 403,780.50
4. Step 4: Simplify right side
   191,781x = 163,038,692,180.25
5. Step 5: Solve for x
   x = 163,038,692,180.25/191,781
6. Step 6: Final answer
   x = 850,129.53