Finding the Fourth Proportional to 2,123.55, 2,928.49 and 1,404.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.55 : 2,928.49 = 1,404.47 : x
2. Step 2: Convert to fraction form
   2,123.55/2,928.49 = 1,404.47/x
3. Step 3: Cross multiply
   2,123.55x = 2,928.49 × 1,404.47
4. Step 4: Simplify right side
   2,123.55x = 4,112,980.16
5. Step 5: Solve for x
   x = 4,112,980.16/2,123.55
6. Step 6: Final answer
   x = 1,936.84