Finding the Fourth Proportional to 1,801.12, 2,485.52 and 1,015.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,801.12 : 2,485.52 = 1,015.16 : x
2. Step 2: Convert to fraction form
   1,801.12/2,485.52 = 1,015.16/x
3. Step 3: Cross multiply
   1,801.12x = 2,485.52 × 1,015.16
4. Step 4: Simplify right side
   1,801.12x = 2,523,200.48
5. Step 5: Solve for x
   x = 2,523,200.48/1,801.12
6. Step 6: Final answer
   x = 1,400.91