Finding the Fourth Proportional to 2,152.94, 2,971.15 and 1,686.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.94 : 2,971.15 = 1,686.38 : x
2. Step 2: Convert to fraction form
   2,152.94/2,971.15 = 1,686.38/x
3. Step 3: Cross multiply
   2,152.94x = 2,971.15 × 1,686.38
4. Step 4: Simplify right side
   2,152.94x = 5,010,468.87
5. Step 5: Solve for x
   x = 5,010,468.87/2,152.94
6. Step 6: Final answer
   x = 2,327.27