Finding the Fourth Proportional to 5,109.08, 7,661.73 and 1,821.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.08 : 7,661.73 = 1,821.56 : x
2. Step 2: Convert to fraction form
   5,109.08/7,661.73 = 1,821.56/x
3. Step 3: Cross multiply
   5,109.08x = 7,661.73 × 1,821.56
4. Step 4: Simplify right side
   5,109.08x = 13,956,300.90
5. Step 5: Solve for x
   x = 13,956,300.90/5,109.08
6. Step 6: Final answer
   x = 2,731.67