Finding the Fourth Proportional to 2,619.59, 3,929.33 and 888.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.59 : 3,929.33 = 888.21 : x
2. Step 2: Convert to fraction form
   2,619.59/3,929.33 = 888.21/x
3. Step 3: Cross multiply
   2,619.59x = 3,929.33 × 888.21
4. Step 4: Simplify right side
   2,619.59x = 3,490,072.42
5. Step 5: Solve for x
   x = 3,490,072.42/2,619.59
6. Step 6: Final answer
   x = 1,332.30