Finding the Fourth Proportional to 2,858.04, 3,942.54 and 2,070.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,858.04 : 3,942.54 = 2,070.72 : x
2. Step 2: Convert to fraction form
   2,858.04/3,942.54 = 2,070.72/x
3. Step 3: Cross multiply
   2,858.04x = 3,942.54 × 2,070.72
4. Step 4: Simplify right side
   2,858.04x = 8,163,896.43
5. Step 5: Solve for x
   x = 8,163,896.43/2,858.04
6. Step 6: Final answer
   x = 2,856.47