Finding the Fourth Proportional to 37,287.31, 51,456.59 and 20,520.31

Step by Step Solution

1. Step 1: Write the proportion equation
   37,287.31 : 51,456.59 = 20,520.31 : x
2. Step 2: Convert to fraction form
   37,287.31/51,456.59 = 20,520.31/x
3. Step 3: Cross multiply
   37,287.31x = 51,456.59 × 20,520.31
4. Step 4: Simplify right side
   37,287.31x = 1,055,905,178.34
5. Step 5: Solve for x
   x = 1,055,905,178.34/37,287.31
6. Step 6: Final answer
   x = 28,318.08