Finding the Fourth Proportional to 37,288.31, 51,457.97 and 20,521.31

Step by Step Solution

1. Step 1: Write the proportion equation
   37,288.31 : 51,457.97 = 20,521.31 : x
2. Step 2: Convert to fraction form
   37,288.31/51,457.97 = 20,521.31/x
3. Step 3: Cross multiply
   37,288.31x = 51,457.97 × 20,521.31
4. Step 4: Simplify right side
   37,288.31x = 1,055,984,954.34
5. Step 5: Solve for x
   x = 1,055,984,954.34/37,288.31
6. Step 6: Final answer
   x = 28,319.46