Finding the Fourth Proportional to 2,089.60, 3,134.72 and 1,224.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,089.60 : 3,134.72 = 1,224.32 : x
2. Step 2: Convert to fraction form
   2,089.60/3,134.72 = 1,224.32/x
3. Step 3: Cross multiply
   2,089.60x = 3,134.72 × 1,224.32
4. Step 4: Simplify right side
   2,089.60x = 3,837,900.39
5. Step 5: Solve for x
   x = 3,837,900.39/2,089.60
6. Step 6: Final answer
   x = 1,836.67