Finding the Fourth Proportional to 6,145.60, 8,496.72 and 5,358.40

Step by Step Solution

1. Step 1: Write the proportion equation
   6,145.60 : 8,496.72 = 5,358.40 : x
2. Step 2: Convert to fraction form
   6,145.60/8,496.72 = 5,358.40/x
3. Step 3: Cross multiply
   6,145.60x = 8,496.72 × 5,358.40
4. Step 4: Simplify right side
   6,145.60x = 45,528,824.45
5. Step 5: Solve for x
   x = 45,528,824.45/6,145.60
6. Step 6: Final answer
   x = 7,408.36