Finding the Fourth Proportional to 10,784.72, 14,865 and 7,421.84

Step by Step Solution

1. Step 1: Write the proportion equation
   10,784.72 : 14,865 = 7,421.84 : x
2. Step 2: Convert to fraction form
   10,784.72/14,865 = 7,421.84/x
3. Step 3: Cross multiply
   10,784.72x = 14,865 × 7,421.84
4. Step 4: Simplify right side
   10,784.72x = 110,325,651.60
5. Step 5: Solve for x
   x = 110,325,651.60/10,784.72
6. Step 6: Final answer
   x = 10,229.81