Finding the Fourth Proportional to 57,809.31, 79,789.72 and 35,143.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,809.31 : 79,789.72 = 35,143.50 : x
2. Step 2: Convert to fraction form
   57,809.31/79,789.72 = 35,143.50/x
3. Step 3: Cross multiply
   57,809.31x = 79,789.72 × 35,143.50
4. Step 4: Simplify right side
   57,809.31x = 2,804,089,936.96
5. Step 5: Solve for x
   x = 2,804,089,936.96/57,809.31
6. Step 6: Final answer
   x = 48,505.85