Finding the Third Proportional to 187,311 and 401,419.50

Step by Step Solution

1. Step 1: Write the proportion equation
   187,311 : 401,419.50 = 401,419.50 : x
2. Step 2: Convert to fraction form
   187,311/401,419.50 = 401,419.50/x
3. Step 3: Cross multiply
   187,311x = 401,419.50 × 401,419.50
4. Step 4: Simplify right side
   187,311x = 161,137,614,980.25
5. Step 5: Solve for x
   x = 161,137,614,980.25/187,311
6. Step 6: Final answer
   x = 860,267.76