Finding the Fourth Proportional to 7,275.39, 10,913.01 and 3,111.87

Step by Step Solution

1. Step 1: Write the proportion equation
   7,275.39 : 10,913.01 = 3,111.87 : x
2. Step 2: Convert to fraction form
   7,275.39/10,913.01 = 3,111.87/x
3. Step 3: Cross multiply
   7,275.39x = 10,913.01 × 3,111.87
4. Step 4: Simplify right side
   7,275.39x = 33,959,868.43
5. Step 5: Solve for x
   x = 33,959,868.43/7,275.39
6. Step 6: Final answer
   x = 4,667.77