Finding the Fourth Proportional to 1,528.55, 2,291.20 and 1,162.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,528.55 : 2,291.20 = 1,162.43 : x
2. Step 2: Convert to fraction form
   1,528.55/2,291.20 = 1,162.43/x
3. Step 3: Cross multiply
   1,528.55x = 2,291.20 × 1,162.43
4. Step 4: Simplify right side
   1,528.55x = 2,663,359.62
5. Step 5: Solve for x
   x = 2,663,359.62/1,528.55
6. Step 6: Final answer
   x = 1,742.41