Finding the Fourth Proportional to 2,809.08, 4,215.54 and 1,077.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,809.08 : 4,215.54 = 1,077.72 : x
2. Step 2: Convert to fraction form
   2,809.08/4,215.54 = 1,077.72/x
3. Step 3: Cross multiply
   2,809.08x = 4,215.54 × 1,077.72
4. Step 4: Simplify right side
   2,809.08x = 4,543,171.77
5. Step 5: Solve for x
   x = 4,543,171.77/2,809.08
6. Step 6: Final answer
   x = 1,617.32