Finding the Fourth Proportional to 2,806.72, 4,210.55 and 1,052.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,806.72 : 4,210.55 = 1,052.35 : x
2. Step 2: Convert to fraction form
   2,806.72/4,210.55 = 1,052.35/x
3. Step 3: Cross multiply
   2,806.72x = 4,210.55 × 1,052.35
4. Step 4: Simplify right side
   2,806.72x = 4,430,972.29
5. Step 5: Solve for x
   x = 4,430,972.29/2,806.72
6. Step 6: Final answer
   x = 1,578.70