Finding the Fourth Proportional to 19,613.12, 29,436.33 and 8,528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,613.12 : 29,436.33 = 8,528.72 : x
2. Step 2: Convert to fraction form
   19,613.12/29,436.33 = 8,528.72/x
3. Step 3: Cross multiply
   19,613.12x = 29,436.33 × 8,528.72
4. Step 4: Simplify right side
   19,613.12x = 251,054,216.40
5. Step 5: Solve for x
   x = 251,054,216.40/19,613.12
6. Step 6: Final answer
   x = 12,800.32