Finding the Fourth Proportional to 7,321.91, 10,104.95 and 4,178.57

Step by Step Solution

1. Step 1: Write the proportion equation
   7,321.91 : 10,104.95 = 4,178.57 : x
2. Step 2: Convert to fraction form
   7,321.91/10,104.95 = 4,178.57/x
3. Step 3: Cross multiply
   7,321.91x = 10,104.95 × 4,178.57
4. Step 4: Simplify right side
   7,321.91x = 42,224,200.84
5. Step 5: Solve for x
   x = 42,224,200.84/7,321.91
6. Step 6: Final answer
   x = 5,766.83