Finding the Third Proportional to 342,456 and 545,395.50

Step by Step Solution

1. Step 1: Write the proportion equation
   342,456 : 545,395.50 = 545,395.50 : x
2. Step 2: Convert to fraction form
   342,456/545,395.50 = 545,395.50/x
3. Step 3: Cross multiply
   342,456x = 545,395.50 × 545,395.50
4. Step 4: Simplify right side
   342,456x = 297,456,251,420.25
5. Step 5: Solve for x
   x = 297,456,251,420.25/342,456
6. Step 6: Final answer
   x = 868,596.99