Finding the Fourth Proportional to 7,113.76, 10,670.88 and 3,993.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,113.76 : 10,670.88 = 3,993.28 : x
2. Step 2: Convert to fraction form
   7,113.76/10,670.88 = 3,993.28/x
3. Step 3: Cross multiply
   7,113.76x = 10,670.88 × 3,993.28
4. Step 4: Simplify right side
   7,113.76x = 42,611,811.69
5. Step 5: Solve for x
   x = 42,611,811.69/7,113.76
6. Step 6: Final answer
   x = 5,990.05