Finding the Fourth Proportional to 617,091.56, 851,665.20 and 345,174.56

Step by Step Solution

1. Step 1: Write the proportion equation
   617,091.56 : 851,665.20 = 345,174.56 : x
2. Step 2: Convert to fraction form
   617,091.56/851,665.20 = 345,174.56/x
3. Step 3: Cross multiply
   617,091.56x = 851,665.20 × 345,174.56
4. Step 4: Simplify right side
   617,091.56x = 293,973,160,677.31
5. Step 5: Solve for x
   x = 293,973,160,677.31/617,091.56
6. Step 6: Final answer
   x = 476,385.00