Finding the Third Proportional to 271,347 and 398,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   271,347 : 398,890.50 = 398,890.50 : x
2. Step 2: Convert to fraction form
   271,347/398,890.50 = 398,890.50/x
3. Step 3: Cross multiply
   271,347x = 398,890.50 × 398,890.50
4. Step 4: Simplify right side
   271,347x = 159,113,630,990.25
5. Step 5: Solve for x
   x = 159,113,630,990.25/271,347
6. Step 6: Final answer
   x = 586,384.34