Finding the Fourth Proportional to 2,521.40, 3,779.56 and 961.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.40 : 3,779.56 = 961.01 : x
2. Step 2: Convert to fraction form
   2,521.40/3,779.56 = 961.01/x
3. Step 3: Cross multiply
   2,521.40x = 3,779.56 × 961.01
4. Step 4: Simplify right side
   2,521.40x = 3,632,194.96
5. Step 5: Solve for x
   x = 3,632,194.96/2,521.40
6. Step 6: Final answer
   x = 1,440.55