Finding the Fourth Proportional to 57,789.31, 79,443.06 and 49,693.32

Step by Step Solution

1. Step 1: Write the proportion equation
   57,789.31 : 79,443.06 = 49,693.32 : x
2. Step 2: Convert to fraction form
   57,789.31/79,443.06 = 49,693.32/x
3. Step 3: Cross multiply
   57,789.31x = 79,443.06 × 49,693.32
4. Step 4: Simplify right side
   57,789.31x = 3,947,789,402.36
5. Step 5: Solve for x
   x = 3,947,789,402.36/57,789.31
6. Step 6: Final answer
   x = 68,313.49