Finding the Fourth Proportional to 10,180.91, 15,271.43 and 2,785.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,180.91 : 15,271.43 = 2,785.20 : x
2. Step 2: Convert to fraction form
   10,180.91/15,271.43 = 2,785.20/x
3. Step 3: Cross multiply
   10,180.91x = 15,271.43 × 2,785.20
4. Step 4: Simplify right side
   10,180.91x = 42,533,972.91
5. Step 5: Solve for x
   x = 42,533,972.91/10,180.91
6. Step 6: Final answer
   x = 4,177.82