Finding the Fourth Proportional to 57,255.48, 79,013.34 and 42,889.86

Step by Step Solution

1. Step 1: Write the proportion equation
   57,255.48 : 79,013.34 = 42,889.86 : x
2. Step 2: Convert to fraction form
   57,255.48/79,013.34 = 42,889.86/x
3. Step 3: Cross multiply
   57,255.48x = 79,013.34 × 42,889.86
4. Step 4: Simplify right side
   57,255.48x = 3,388,871,090.73
5. Step 5: Solve for x
   x = 3,388,871,090.73/57,255.48
6. Step 6: Final answer
   x = 59,188.59