Finding the Fourth Proportional to 37,434.72, 51,659.05 and 20,438.31

Step by Step Solution

1. Step 1: Write the proportion equation
   37,434.72 : 51,659.05 = 20,438.31 : x
2. Step 2: Convert to fraction form
   37,434.72/51,659.05 = 20,438.31/x
3. Step 3: Cross multiply
   37,434.72x = 51,659.05 × 20,438.31
4. Step 4: Simplify right side
   37,434.72x = 1,055,823,678.21
5. Step 5: Solve for x
   x = 1,055,823,678.21/37,434.72
6. Step 6: Final answer
   x = 28,204.40