Finding the Fourth Proportional to 5,388.30, 7,435.49 and 3,150.80

Step by Step Solution

1. Step 1: Write the proportion equation
   5,388.30 : 7,435.49 = 3,150.80 : x
2. Step 2: Convert to fraction form
   5,388.30/7,435.49 = 3,150.80/x
3. Step 3: Cross multiply
   5,388.30x = 7,435.49 × 3,150.80
4. Step 4: Simplify right side
   5,388.30x = 23,427,741.89
5. Step 5: Solve for x
   x = 23,427,741.89/5,388.30
6. Step 6: Final answer
   x = 4,347.89