Finding the Fourth Proportional to 2,621.25, 3,931.97 and 890.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.25 : 3,931.97 = 890.01 : x
2. Step 2: Convert to fraction form
   2,621.25/3,931.97 = 890.01/x
3. Step 3: Cross multiply
   2,621.25x = 3,931.97 × 890.01
4. Step 4: Simplify right side
   2,621.25x = 3,499,488.17
5. Step 5: Solve for x
   x = 3,499,488.17/2,621.25
6. Step 6: Final answer
   x = 1,335.05