Finding the Fourth Proportional to 5,153.59, 7,111.86 and 2,915.39

Step by Step Solution

1. Step 1: Write the proportion equation
   5,153.59 : 7,111.86 = 2,915.39 : x
2. Step 2: Convert to fraction form
   5,153.59/7,111.86 = 2,915.39/x
3. Step 3: Cross multiply
   5,153.59x = 7,111.86 × 2,915.39
4. Step 4: Simplify right side
   5,153.59x = 20,733,845.53
5. Step 5: Solve for x
   x = 20,733,845.53/5,153.59
6. Step 6: Final answer
   x = 4,023.18