Finding the Third Proportional to 355,661 and 545,333.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,661 : 545,333.50 = 545,333.50 : x
2. Step 2: Convert to fraction form
   355,661/545,333.50 = 545,333.50/x
3. Step 3: Cross multiply
   355,661x = 545,333.50 × 545,333.50
4. Step 4: Simplify right side
   355,661x = 297,388,626,222.25
5. Step 5: Solve for x
   x = 297,388,626,222.25/355,661
6. Step 6: Final answer
   x = 836,157.54