Finding the Fourth Proportional to 5,216.32, 7,205.43 and 3,887.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,216.32 : 7,205.43 = 3,887.72 : x
2. Step 2: Convert to fraction form
   5,216.32/7,205.43 = 3,887.72/x
3. Step 3: Cross multiply
   5,216.32x = 7,205.43 × 3,887.72
4. Step 4: Simplify right side
   5,216.32x = 28,012,679.74
5. Step 5: Solve for x
   x = 28,012,679.74/5,216.32
6. Step 6: Final answer
   x = 5,370.20