Finding the Fourth Proportional to 2,987.76, 4,473.42 and 2,255.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,987.76 : 4,473.42 = 2,255.12 : x
2. Step 2: Convert to fraction form
   2,987.76/4,473.42 = 2,255.12/x
3. Step 3: Cross multiply
   2,987.76x = 4,473.42 × 2,255.12
4. Step 4: Simplify right side
   2,987.76x = 10,088,098.91
5. Step 5: Solve for x
   x = 10,088,098.91/2,987.76
6. Step 6: Final answer
   x = 3,376.48