Finding the Fourth Proportional to 39,667.62, 54,740.38 and 21,762.47

Step by Step Solution

1. Step 1: Write the proportion equation
   39,667.62 : 54,740.38 = 21,762.47 : x
2. Step 2: Convert to fraction form
   39,667.62/54,740.38 = 21,762.47/x
3. Step 3: Cross multiply
   39,667.62x = 54,740.38 × 21,762.47
4. Step 4: Simplify right side
   39,667.62x = 1,191,286,061.99
5. Step 5: Solve for x
   x = 1,191,286,061.99/39,667.62
6. Step 6: Final answer
   x = 30,031.70