Finding the Fourth Proportional to 2,152.56, 2,971.20 and 1,679.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.56 : 2,971.20 = 1,679.04 : x
2. Step 2: Convert to fraction form
   2,152.56/2,971.20 = 1,679.04/x
3. Step 3: Cross multiply
   2,152.56x = 2,971.20 × 1,679.04
4. Step 4: Simplify right side
   2,152.56x = 4,988,763.65
5. Step 5: Solve for x
   x = 4,988,763.65/2,152.56
6. Step 6: Final answer
   x = 2,317.60