Finding the Fourth Proportional to 37,911, 56,892.42 and 13,287

Step by Step Solution

1. Step 1: Write the proportion equation
   37,911 : 56,892.42 = 13,287 : x
2. Step 2: Convert to fraction form
   37,911/56,892.42 = 13,287/x
3. Step 3: Cross multiply
   37,911x = 56,892.42 × 13,287
4. Step 4: Simplify right side
   37,911x = 755,929,584.54
5. Step 5: Solve for x
   x = 755,929,584.54/37,911
6. Step 6: Final answer
   x = 19,939.58