Finding the Fourth Proportional to 57,978.29, 80,171.10 and 46,020.87

Step by Step Solution

1. Step 1: Write the proportion equation
   57,978.29 : 80,171.10 = 46,020.87 : x
2. Step 2: Convert to fraction form
   57,978.29/80,171.10 = 46,020.87/x
3. Step 3: Cross multiply
   57,978.29x = 80,171.10 × 46,020.87
4. Step 4: Simplify right side
   57,978.29x = 3,689,543,540.75
5. Step 5: Solve for x
   x = 3,689,543,540.75/57,978.29
6. Step 6: Final answer
   x = 63,636.64