Finding the Fourth Proportional to 1,636.77, 2,457.62 and 1,408.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.77 : 2,457.62 = 1,408.15 : x
2. Step 2: Convert to fraction form
   1,636.77/2,457.62 = 1,408.15/x
3. Step 3: Cross multiply
   1,636.77x = 2,457.62 × 1,408.15
4. Step 4: Simplify right side
   1,636.77x = 3,460,678.27
5. Step 5: Solve for x
   x = 3,460,678.27/1,636.77
6. Step 6: Final answer
   x = 2,114.33