Finding the Fourth Proportional to 1,055.12, 1,581.60 and 534.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055.12 : 1,581.60 = 534.16 : x
2. Step 2: Convert to fraction form
   1,055.12/1,581.60 = 534.16/x
3. Step 3: Cross multiply
   1,055.12x = 1,581.60 × 534.16
4. Step 4: Simplify right side
   1,055.12x = 844,819.55
5. Step 5: Solve for x
   x = 844,819.55/1,055.12
6. Step 6: Final answer
   x = 800.69