Finding the Fourth Proportional to 19,298.72, 28,946.56 and 8,910.56

Step by Step Solution

1. Step 1: Write the proportion equation
   19,298.72 : 28,946.56 = 8,910.56 : x
2. Step 2: Convert to fraction form
   19,298.72/28,946.56 = 8,910.56/x
3. Step 3: Cross multiply
   19,298.72x = 28,946.56 × 8,910.56
4. Step 4: Simplify right side
   19,298.72x = 257,930,059.67
5. Step 5: Solve for x
   x = 257,930,059.67/19,298.72
6. Step 6: Final answer
   x = 13,365.14