Finding the Fourth Proportional to 3,950.88, 5,931.12 and 3,620.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,950.88 : 5,931.12 = 3,620.40 : x
2. Step 2: Convert to fraction form
   3,950.88/5,931.12 = 3,620.40/x
3. Step 3: Cross multiply
   3,950.88x = 5,931.12 × 3,620.40
4. Step 4: Simplify right side
   3,950.88x = 21,473,026.85
5. Step 5: Solve for x
   x = 21,473,026.85/3,950.88
6. Step 6: Final answer
   x = 5,435.00