Finding the Fourth Proportional to 57,158.41, 79,353.76 and 55,447.69

Step by Step Solution

1. Step 1: Write the proportion equation
   57,158.41 : 79,353.76 = 55,447.69 : x
2. Step 2: Convert to fraction form
   57,158.41/79,353.76 = 55,447.69/x
3. Step 3: Cross multiply
   57,158.41x = 79,353.76 × 55,447.69
4. Step 4: Simplify right side
   57,158.41x = 4,399,982,684.81
5. Step 5: Solve for x
   x = 4,399,982,684.81/57,158.41
6. Step 6: Final answer
   x = 76,978.75