Finding the Fourth Proportional to 1,558.12, 2,153 and 1,115.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,558.12 : 2,153 = 1,115.24 : x
2. Step 2: Convert to fraction form
   1,558.12/2,153 = 1,115.24/x
3. Step 3: Cross multiply
   1,558.12x = 2,153 × 1,115.24
4. Step 4: Simplify right side
   1,558.12x = 2,401,111.72
5. Step 5: Solve for x
   x = 2,401,111.72/1,558.12
6. Step 6: Final answer
   x = 1,541.03