Finding the Fourth Proportional to 2,147.56, 3,219.59 and 1,421.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.56 : 3,219.59 = 1,421.53 : x
2. Step 2: Convert to fraction form
   2,147.56/3,219.59 = 1,421.53/x
3. Step 3: Cross multiply
   2,147.56x = 3,219.59 × 1,421.53
4. Step 4: Simplify right side
   2,147.56x = 4,576,736.67
5. Step 5: Solve for x
   x = 4,576,736.67/2,147.56
6. Step 6: Final answer
   x = 2,131.13