Finding the Fourth Proportional to 36,978.91, 51,030.88 and 20,211.91

Step by Step Solution

1. Step 1: Write the proportion equation
   36,978.91 : 51,030.88 = 20,211.91 : x
2. Step 2: Convert to fraction form
   36,978.91/51,030.88 = 20,211.91/x
3. Step 3: Cross multiply
   36,978.91x = 51,030.88 × 20,211.91
4. Step 4: Simplify right side
   36,978.91x = 1,031,431,553.78
5. Step 5: Solve for x
   x = 1,031,431,553.78/36,978.91
6. Step 6: Final answer
   x = 27,892.43