Finding the Fourth Proportional to 5,003.72, 7,507.73 and 2,809.16

Step by Step Solution

1. Step 1: Write the proportion equation
   5,003.72 : 7,507.73 = 2,809.16 : x
2. Step 2: Convert to fraction form
   5,003.72/7,507.73 = 2,809.16/x
3. Step 3: Cross multiply
   5,003.72x = 7,507.73 × 2,809.16
4. Step 4: Simplify right side
   5,003.72x = 21,090,414.81
5. Step 5: Solve for x
   x = 21,090,414.81/5,003.72
6. Step 6: Final answer
   x = 4,214.95