Finding the Fourth Proportional to 617,085.50, 851,656.85 and 345,168.50

Step by Step Solution

1. Step 1: Write the proportion equation
   617,085.50 : 851,656.85 = 345,168.50 : x
2. Step 2: Convert to fraction form
   617,085.50/851,656.85 = 345,168.50/x
3. Step 3: Cross multiply
   617,085.50x = 851,656.85 × 345,168.50
4. Step 4: Simplify right side
   617,085.50x = 293,965,112,739.48
5. Step 5: Solve for x
   x = 293,965,112,739.48/617,085.50
6. Step 6: Final answer
   x = 476,376.64