Finding the Fourth Proportional to 5,153.56, 7,111.80 and 2,915.53

Step by Step Solution

1. Step 1: Write the proportion equation
   5,153.56 : 7,111.80 = 2,915.53 : x
2. Step 2: Convert to fraction form
   5,153.56/7,111.80 = 2,915.53/x
3. Step 3: Cross multiply
   5,153.56x = 7,111.80 × 2,915.53
4. Step 4: Simplify right side
   5,153.56x = 20,734,666.25
5. Step 5: Solve for x
   x = 20,734,666.25/5,153.56
6. Step 6: Final answer
   x = 4,023.37