Finding the Fourth Proportional to 2,607.16, 3,909.94 and 1,421

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.16 : 3,909.94 = 1,421 : x
2. Step 2: Convert to fraction form
   2,607.16/3,909.94 = 1,421/x
3. Step 3: Cross multiply
   2,607.16x = 3,909.94 × 1,421
4. Step 4: Simplify right side
   2,607.16x = 5,556,024.74
5. Step 5: Solve for x
   x = 5,556,024.74/2,607.16
6. Step 6: Final answer
   x = 2,131.06