Finding the Fourth Proportional to 37,587.10, 51,870.09 and 20,820.10

Step by Step Solution

1. Step 1: Write the proportion equation
   37,587.10 : 51,870.09 = 20,820.10 : x
2. Step 2: Convert to fraction form
   37,587.10/51,870.09 = 20,820.10/x
3. Step 3: Cross multiply
   37,587.10x = 51,870.09 × 20,820.10
4. Step 4: Simplify right side
   37,587.10x = 1,079,940,460.81
5. Step 5: Solve for x
   x = 1,079,940,460.81/37,587.10
6. Step 6: Final answer
   x = 28,731.68