Finding the Fourth Proportional to 12,321.84, 18,485.28 and 4,530.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,321.84 : 18,485.28 = 4,530.72 : x
2. Step 2: Convert to fraction form
   12,321.84/18,485.28 = 4,530.72/x
3. Step 3: Cross multiply
   12,321.84x = 18,485.28 × 4,530.72
4. Step 4: Simplify right side
   12,321.84x = 83,751,627.80
5. Step 5: Solve for x
   x = 83,751,627.80/12,321.84
6. Step 6: Final answer
   x = 6,797.01