Finding the Fourth Proportional to 2,289.60, 3,158.28 and 1,404.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.60 : 3,158.28 = 1,404.72 : x
2. Step 2: Convert to fraction form
   2,289.60/3,158.28 = 1,404.72/x
3. Step 3: Cross multiply
   2,289.60x = 3,158.28 × 1,404.72
4. Step 4: Simplify right side
   2,289.60x = 4,436,499.08
5. Step 5: Solve for x
   x = 4,436,499.08/2,289.60
6. Step 6: Final answer
   x = 1,937.67