Finding the Fourth Proportional to 1,616.34, 2,422.89 and 1,421.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,616.34 : 2,422.89 = 1,421.94 : x
2. Step 2: Convert to fraction form
   1,616.34/2,422.89 = 1,421.94/x
3. Step 3: Cross multiply
   1,616.34x = 2,422.89 × 1,421.94
4. Step 4: Simplify right side
   1,616.34x = 3,445,204.21
5. Step 5: Solve for x
   x = 3,445,204.21/1,616.34
6. Step 6: Final answer
   x = 2,131.48