Finding the Fourth Proportional to 13,291.56, 19,939.16 and 3,932.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,291.56 : 19,939.16 = 3,932.31 : x
2. Step 2: Convert to fraction form
   13,291.56/19,939.16 = 3,932.31/x
3. Step 3: Cross multiply
   13,291.56x = 19,939.16 × 3,932.31
4. Step 4: Simplify right side
   13,291.56x = 78,406,958.26
5. Step 5: Solve for x
   x = 78,406,958.26/13,291.56
6. Step 6: Final answer
   x = 5,899.00