Finding the Fourth Proportional to 71,667.20, 107,530.40 and 36,109.31

Step by Step Solution

1. Step 1: Write the proportion equation
   71,667.20 : 107,530.40 = 36,109.31 : x
2. Step 2: Convert to fraction form
   71,667.20/107,530.40 = 36,109.31/x
3. Step 3: Cross multiply
   71,667.20x = 107,530.40 × 36,109.31
4. Step 4: Simplify right side
   71,667.20x = 3,882,848,100.65
5. Step 5: Solve for x
   x = 3,882,848,100.65/71,667.20
6. Step 6: Final answer
   x = 54,178.87