Finding the Fourth Proportional to 611,977.50, 844,608.15 and 343,705.50

Step by Step Solution

1. Step 1: Write the proportion equation
   611,977.50 : 844,608.15 = 343,705.50 : x
2. Step 2: Convert to fraction form
   611,977.50/844,608.15 = 343,705.50/x
3. Step 3: Cross multiply
   611,977.50x = 844,608.15 × 343,705.50
4. Step 4: Simplify right side
   611,977.50x = 290,296,466,499.83
5. Step 5: Solve for x
   x = 290,296,466,499.83/611,977.50
6. Step 6: Final answer
   x = 474,358.07