Finding the Third Proportional to 258,511.50 and 546,831

Step by Step Solution

1. Step 1: Write the proportion equation
   258,511.50 : 546,831 = 546,831 : x
2. Step 2: Convert to fraction form
   258,511.50/546,831 = 546,831/x
3. Step 3: Cross multiply
   258,511.50x = 546,831 × 546,831
4. Step 4: Simplify right side
   258,511.50x = 299,024,142,561
5. Step 5: Solve for x
   x = 299,024,142,561/258,511.50
6. Step 6: Final answer
   x = 1,156,715.05