Finding the Fourth Proportional to 57,967.69, 80,404.67 and 56,431.32

Step by Step Solution

1. Step 1: Write the proportion equation
   57,967.69 : 80,404.67 = 56,431.32 : x
2. Step 2: Convert to fraction form
   57,967.69/80,404.67 = 56,431.32/x
3. Step 3: Cross multiply
   57,967.69x = 80,404.67 × 56,431.32
4. Step 4: Simplify right side
   57,967.69x = 4,537,341,662.26
5. Step 5: Solve for x
   x = 4,537,341,662.26/57,967.69
6. Step 6: Final answer
   x = 78,273.63