Finding the Fourth Proportional to 2,940.12, 4,056.84 and 1,820.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,940.12 : 4,056.84 = 1,820.16 : x
2. Step 2: Convert to fraction form
   2,940.12/4,056.84 = 1,820.16/x
3. Step 3: Cross multiply
   2,940.12x = 4,056.84 × 1,820.16
4. Step 4: Simplify right side
   2,940.12x = 7,384,097.89
5. Step 5: Solve for x
   x = 7,384,097.89/2,940.12
6. Step 6: Final answer
   x = 2,511.50