Finding the Fourth Proportional to 5,383.59, 7,428.69 and 3,115.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,383.59 : 7,428.69 = 3,115.32 : x
2. Step 2: Convert to fraction form
   5,383.59/7,428.69 = 3,115.32/x
3. Step 3: Cross multiply
   5,383.59x = 7,428.69 × 3,115.32
4. Step 4: Simplify right side
   5,383.59x = 23,142,746.53
5. Step 5: Solve for x
   x = 23,142,746.53/5,383.59
6. Step 6: Final answer
   x = 4,298.76