Finding the Fourth Proportional to 1,150.89, 1,586.43 and 1,055.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.89 : 1,586.43 = 1,055.55 : x
2. Step 2: Convert to fraction form
   1,150.89/1,586.43 = 1,055.55/x
3. Step 3: Cross multiply
   1,150.89x = 1,586.43 × 1,055.55
4. Step 4: Simplify right side
   1,150.89x = 1,674,556.19
5. Step 5: Solve for x
   x = 1,674,556.19/1,150.89
6. Step 6: Final answer
   x = 1,455.01