Finding the Fourth Proportional to 5,153.39, 7,111.59 and 2,915.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,153.39 : 7,111.59 = 2,915.18 : x
2. Step 2: Convert to fraction form
   5,153.39/7,111.59 = 2,915.18/x
3. Step 3: Cross multiply
   5,153.39x = 7,111.59 × 2,915.18
4. Step 4: Simplify right side
   5,153.39x = 20,731,564.94
5. Step 5: Solve for x
   x = 20,731,564.94/5,153.39
6. Step 6: Final answer
   x = 4,022.90