Finding the Fourth Proportional to 2,116.34, 2,920.42 and 1,172.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.34 : 2,920.42 = 1,172.10 : x
2. Step 2: Convert to fraction form
   2,116.34/2,920.42 = 1,172.10/x
3. Step 3: Cross multiply
   2,116.34x = 2,920.42 × 1,172.10
4. Step 4: Simplify right side
   2,116.34x = 3,423,024.28
5. Step 5: Solve for x
   x = 3,423,024.28/2,116.34
6. Step 6: Final answer
   x = 1,617.43