Finding the Fourth Proportional to 2,114.71, 3,172.55 and 1,140.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.71 : 3,172.55 = 1,140.79 : x
2. Step 2: Convert to fraction form
   2,114.71/3,172.55 = 1,140.79/x
3. Step 3: Cross multiply
   2,114.71x = 3,172.55 × 1,140.79
4. Step 4: Simplify right side
   2,114.71x = 3,619,213.31
5. Step 5: Solve for x
   x = 3,619,213.31/2,114.71
6. Step 6: Final answer
   x = 1,711.45