Finding the Fourth Proportional to 2,555.48, 3,526.70 and 1,421.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555.48 : 3,526.70 = 1,421.27 : x
2. Step 2: Convert to fraction form
   2,555.48/3,526.70 = 1,421.27/x
3. Step 3: Cross multiply
   2,555.48x = 3,526.70 × 1,421.27
4. Step 4: Simplify right side
   2,555.48x = 5,012,368.17
5. Step 5: Solve for x
   x = 5,012,368.17/2,555.48
6. Step 6: Final answer
   x = 1,961.42