Finding the Fourth Proportional to 462,845.82, 638,544.63 and 290,662.50

Step by Step Solution

1. Step 1: Write the proportion equation
   462,845.82 : 638,544.63 = 290,662.50 : x
2. Step 2: Convert to fraction form
   462,845.82/638,544.63 = 290,662.50/x
3. Step 3: Cross multiply
   462,845.82x = 638,544.63 × 290,662.50
4. Step 4: Simplify right side
   462,845.82x = 185,600,978,517.38
5. Step 5: Solve for x
   x = 185,600,978,517.38/462,845.82
6. Step 6: Final answer
   x = 400,999.58