Finding the Fourth Proportional to 2,621.58, 3,932.91 and 890.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.58 : 3,932.91 = 890.34 : x
2. Step 2: Convert to fraction form
   2,621.58/3,932.91 = 890.34/x
3. Step 3: Cross multiply
   2,621.58x = 3,932.91 × 890.34
4. Step 4: Simplify right side
   2,621.58x = 3,501,627.09
5. Step 5: Solve for x
   x = 3,501,627.09/2,621.58
6. Step 6: Final answer
   x = 1,335.69