Finding the Fourth Proportional to 2,808.16, 4,210.72 and 1,164.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808.16 : 4,210.72 = 1,164.40 : x
2. Step 2: Convert to fraction form
   2,808.16/4,210.72 = 1,164.40/x
3. Step 3: Cross multiply
   2,808.16x = 4,210.72 × 1,164.40
4. Step 4: Simplify right side
   2,808.16x = 4,902,962.37
5. Step 5: Solve for x
   x = 4,902,962.37/2,808.16
6. Step 6: Final answer
   x = 1,745.97