Finding the Fourth Proportional to 57,291.89, 79,077.35 and 39,149.96

Step by Step Solution

1. Step 1: Write the proportion equation
   57,291.89 : 79,077.35 = 39,149.96 : x
2. Step 2: Convert to fraction form
   57,291.89/79,077.35 = 39,149.96/x
3. Step 3: Cross multiply
   57,291.89x = 79,077.35 × 39,149.96
4. Step 4: Simplify right side
   57,291.89x = 3,095,875,091.35
5. Step 5: Solve for x
   x = 3,095,875,091.35/57,291.89
6. Step 6: Final answer
   x = 54,036.88