Finding the Fourth Proportional to 287,443.10, 396,683.73 and 160,118.75

Step by Step Solution

1. Step 1: Write the proportion equation
   287,443.10 : 396,683.73 = 160,118.75 : x
2. Step 2: Convert to fraction form
   287,443.10/396,683.73 = 160,118.75/x
3. Step 3: Cross multiply
   287,443.10x = 396,683.73 × 160,118.75
4. Step 4: Simplify right side
   287,443.10x = 63,516,501,009.52
5. Step 5: Solve for x
   x = 63,516,501,009.52/287,443.10
6. Step 6: Final answer
   x = 220,970.70