Finding the Fourth Proportional to 2,114.91, 3,172.52 and 654.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.91 : 3,172.52 = 654.05 : x
2. Step 2: Convert to fraction form
   2,114.91/3,172.52 = 654.05/x
3. Step 3: Cross multiply
   2,114.91x = 3,172.52 × 654.05
4. Step 4: Simplify right side
   2,114.91x = 2,074,996.27
5. Step 5: Solve for x
   x = 2,074,996.27/2,114.91
6. Step 6: Final answer
   x = 981.13