Finding the Fourth Proportional to 1,352.81, 1,865.18 and 1,129.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,352.81 : 1,865.18 = 1,129.06 : x
2. Step 2: Convert to fraction form
   1,352.81/1,865.18 = 1,129.06/x
3. Step 3: Cross multiply
   1,352.81x = 1,865.18 × 1,129.06
4. Step 4: Simplify right side
   1,352.81x = 2,105,904.79
5. Step 5: Solve for x
   x = 2,105,904.79/1,352.81
6. Step 6: Final answer
   x = 1,556.70