Finding the Fourth Proportional to 2,123.52, 3,186.84 and 1,392.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.52 : 3,186.84 = 1,392.84 : x
2. Step 2: Convert to fraction form
   2,123.52/3,186.84 = 1,392.84/x
3. Step 3: Cross multiply
   2,123.52x = 3,186.84 × 1,392.84
4. Step 4: Simplify right side
   2,123.52x = 4,438,758.23
5. Step 5: Solve for x
   x = 4,438,758.23/2,123.52
6. Step 6: Final answer
   x = 2,090.28