Finding the Fourth Proportional to 1,931.12, 2,879.72 and 1,913.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,931.12 : 2,879.72 = 1,913.58 : x
2. Step 2: Convert to fraction form
   1,931.12/2,879.72 = 1,913.58/x
3. Step 3: Cross multiply
   1,931.12x = 2,879.72 × 1,913.58
4. Step 4: Simplify right side
   1,931.12x = 5,510,574.60
5. Step 5: Solve for x
   x = 5,510,574.60/1,931.12
6. Step 6: Final answer
   x = 2,853.56