Finding the Fourth Proportional to 2,289.02, 3,430.83 and 1,055.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,289.02 : 3,430.83 = 1,055.30 : x
2. Step 2: Convert to fraction form
   2,289.02/3,430.83 = 1,055.30/x
3. Step 3: Cross multiply
   2,289.02x = 3,430.83 × 1,055.30
4. Step 4: Simplify right side
   2,289.02x = 3,620,554.90
5. Step 5: Solve for x
   x = 3,620,554.90/2,289.02
6. Step 6: Final answer
   x = 1,581.71