Finding the Fourth Proportional to 2,421.87, 3,342.69 and 1,537.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,421.87 : 3,342.69 = 1,537.89 : x
2. Step 2: Convert to fraction form
   2,421.87/3,342.69 = 1,537.89/x
3. Step 3: Cross multiply
   2,421.87x = 3,342.69 × 1,537.89
4. Step 4: Simplify right side
   2,421.87x = 5,140,689.52
5. Step 5: Solve for x
   x = 5,140,689.52/2,421.87
6. Step 6: Final answer
   x = 2,122.61