Finding the Fourth Proportional to 1,660.72, 2,485.86 and 1,517.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,660.72 : 2,485.86 = 1,517.32 : x
2. Step 2: Convert to fraction form
   1,660.72/2,485.86 = 1,517.32/x
3. Step 3: Cross multiply
   1,660.72x = 2,485.86 × 1,517.32
4. Step 4: Simplify right side
   1,660.72x = 3,771,845.10
5. Step 5: Solve for x
   x = 3,771,845.10/1,660.72
6. Step 6: Final answer
   x = 2,271.21