Finding the Fourth Proportional to 39,882.79, 59,805.82 and 13,580.47

Step by Step Solution

1. Step 1: Write the proportion equation
   39,882.79 : 59,805.82 = 13,580.47 : x
2. Step 2: Convert to fraction form
   39,882.79/59,805.82 = 13,580.47/x
3. Step 3: Cross multiply
   39,882.79x = 59,805.82 × 13,580.47
4. Step 4: Simplify right side
   39,882.79x = 812,191,144.34
5. Step 5: Solve for x
   x = 812,191,144.34/39,882.79
6. Step 6: Final answer
   x = 20,364.45