Finding the Fourth Proportional to 5,109.02, 7,050.55 and 3,991.26

Step by Step Solution

1. Step 1: Write the proportion equation
   5,109.02 : 7,050.55 = 3,991.26 : x
2. Step 2: Convert to fraction form
   5,109.02/7,050.55 = 3,991.26/x
3. Step 3: Cross multiply
   5,109.02x = 7,050.55 × 3,991.26
4. Step 4: Simplify right side
   5,109.02x = 28,140,578.19
5. Step 5: Solve for x
   x = 28,140,578.19/5,109.02
6. Step 6: Final answer
   x = 5,508.02