Finding the Fourth Proportional to 3,384.08, 5,072.72 and 1,920.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,384.08 : 5,072.72 = 1,920.18 : x
2. Step 2: Convert to fraction form
   3,384.08/5,072.72 = 1,920.18/x
3. Step 3: Cross multiply
   3,384.08x = 5,072.72 × 1,920.18
4. Step 4: Simplify right side
   3,384.08x = 9,740,525.89
5. Step 5: Solve for x
   x = 9,740,525.89/3,384.08
6. Step 6: Final answer
   x = 2,878.34