Finding the Fourth Proportional to 2,151.16, 3,218.59 and 1,274.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.16 : 3,218.59 = 1,274.13 : x
2. Step 2: Convert to fraction form
   2,151.16/3,218.59 = 1,274.13/x
3. Step 3: Cross multiply
   2,151.16x = 3,218.59 × 1,274.13
4. Step 4: Simplify right side
   2,151.16x = 4,100,895.71
5. Step 5: Solve for x
   x = 4,100,895.71/2,151.16
6. Step 6: Final answer
   x = 1,906.37