Finding the Fourth Proportional to 287,003.57, 430,487.94 and 107,054.31

Step by Step Solution

1. Step 1: Write the proportion equation
   287,003.57 : 430,487.94 = 107,054.31 : x
2. Step 2: Convert to fraction form
   287,003.57/430,487.94 = 107,054.31/x
3. Step 3: Cross multiply
   287,003.57x = 430,487.94 × 107,054.31
4. Step 4: Simplify right side
   287,003.57x = 46,085,589,380.02
5. Step 5: Solve for x
   x = 46,085,589,380.02/287,003.57
6. Step 6: Final answer
   x = 160,574.97