Finding the Fourth Proportional to 1,911.52, 2,870.16 and 1,669.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,911.52 : 2,870.16 = 1,669.60 : x
2. Step 2: Convert to fraction form
   1,911.52/2,870.16 = 1,669.60/x
3. Step 3: Cross multiply
   1,911.52x = 2,870.16 × 1,669.60
4. Step 4: Simplify right side
   1,911.52x = 4,792,019.14
5. Step 5: Solve for x
   x = 4,792,019.14/1,911.52
6. Step 6: Final answer
   x = 2,506.92