Finding the Fourth Proportional to 7,111.30, 10,667.22 and 2,729.20

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.30 : 10,667.22 = 2,729.20 : x
2. Step 2: Convert to fraction form
   7,111.30/10,667.22 = 2,729.20/x
3. Step 3: Cross multiply
   7,111.30x = 10,667.22 × 2,729.20
4. Step 4: Simplify right side
   7,111.30x = 29,112,976.82
5. Step 5: Solve for x
   x = 29,112,976.82/7,111.30
6. Step 6: Final answer
   x = 4,093.90