Finding the Third Proportional to 271,345 and 398,887.50

Step by Step Solution

1. Step 1: Write the proportion equation
   271,345 : 398,887.50 = 398,887.50 : x
2. Step 2: Convert to fraction form
   271,345/398,887.50 = 398,887.50/x
3. Step 3: Cross multiply
   271,345x = 398,887.50 × 398,887.50
4. Step 4: Simplify right side
   271,345x = 159,111,237,656.25
5. Step 5: Solve for x
   x = 159,111,237,656.25/271,345
6. Step 6: Final answer
   x = 586,379.84