Finding the Fourth Proportional to 3,384.12, 5,071.72 and 1,820.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,384.12 : 5,071.72 = 1,820.28 : x
2. Step 2: Convert to fraction form
   3,384.12/5,071.72 = 1,820.28/x
3. Step 3: Cross multiply
   3,384.12x = 5,071.72 × 1,820.28
4. Step 4: Simplify right side
   3,384.12x = 9,231,950.48
5. Step 5: Solve for x
   x = 9,231,950.48/3,384.12
6. Step 6: Final answer
   x = 2,728.02