Finding the Fourth Proportional to 617,091.76, 851,665.50 and 345,174.76

Step by Step Solution

1. Step 1: Write the proportion equation
   617,091.76 : 851,665.50 = 345,174.76 : x
2. Step 2: Convert to fraction form
   617,091.76/851,665.50 = 345,174.76/x
3. Step 3: Cross multiply
   617,091.76x = 851,665.50 × 345,174.76
4. Step 4: Simplify right side
   617,091.76x = 293,973,434,562.78
5. Step 5: Solve for x
   x = 293,973,434,562.78/617,091.76
6. Step 6: Final answer
   x = 476,385.29