Finding the Fourth Proportional to 1,581.60, 2,369.30 and 1,289.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.60 : 2,369.30 = 1,289.46 : x
2. Step 2: Convert to fraction form
   1,581.60/2,369.30 = 1,289.46/x
3. Step 3: Cross multiply
   1,581.60x = 2,369.30 × 1,289.46
4. Step 4: Simplify right side
   1,581.60x = 3,055,111.13
5. Step 5: Solve for x
   x = 3,055,111.13/1,581.60
6. Step 6: Final answer
   x = 1,931.66