Finding the Third Proportional to 355,146 and 543,289.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,146 : 543,289.50 = 543,289.50 : x
2. Step 2: Convert to fraction form
   355,146/543,289.50 = 543,289.50/x
3. Step 3: Cross multiply
   355,146x = 543,289.50 × 543,289.50
4. Step 4: Simplify right side
   355,146x = 295,163,480,810.25
5. Step 5: Solve for x
   x = 295,163,480,810.25/355,146
6. Step 6: Final answer
   x = 831,104.62