Finding the Fourth Proportional to 615,977.89, 850,066.61 and 340,353.50

Step by Step Solution

1. Step 1: Write the proportion equation
   615,977.89 : 850,066.61 = 340,353.50 : x
2. Step 2: Convert to fraction form
   615,977.89/850,066.61 = 340,353.50/x
3. Step 3: Cross multiply
   615,977.89x = 850,066.61 × 340,353.50
4. Step 4: Simplify right side
   615,977.89x = 289,323,139,994.54
5. Step 5: Solve for x
   x = 289,323,139,994.54/615,977.89
6. Step 6: Final answer
   x = 469,697.28