Finding the Fourth Proportional to 39,667.81, 59,507.28 and 11,589.91

Step by Step Solution

1. Step 1: Write the proportion equation
   39,667.81 : 59,507.28 = 11,589.91 : x
2. Step 2: Convert to fraction form
   39,667.81/59,507.28 = 11,589.91/x
3. Step 3: Cross multiply
   39,667.81x = 59,507.28 × 11,589.91
4. Step 4: Simplify right side
   39,667.81x = 689,684,019.54
5. Step 5: Solve for x
   x = 689,684,019.54/39,667.81
6. Step 6: Final answer
   x = 17,386.49