Finding the Fourth Proportional to 1,518.42, 2,275.50 and 1,055.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,518.42 : 2,275.50 = 1,055.51 : x
2. Step 2: Convert to fraction form
   1,518.42/2,275.50 = 1,055.51/x
3. Step 3: Cross multiply
   1,518.42x = 2,275.50 × 1,055.51
4. Step 4: Simplify right side
   1,518.42x = 2,401,801.63
5. Step 5: Solve for x
   x = 2,401,801.63/1,518.42
6. Step 6: Final answer
   x = 1,581.78