Finding the Fourth Proportional to 2,870.38, 3,953.58 and 2,205.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.38 : 3,953.58 = 2,205.96 : x
2. Step 2: Convert to fraction form
   2,870.38/3,953.58 = 2,205.96/x
3. Step 3: Cross multiply
   2,870.38x = 3,953.58 × 2,205.96
4. Step 4: Simplify right side
   2,870.38x = 8,721,439.34
5. Step 5: Solve for x
   x = 8,721,439.34/2,870.38
6. Step 6: Final answer
   x = 3,038.43