Finding the Fourth Proportional to 19,109.23, 28,648.05 and 7,260.55

Step by Step Solution

1. Step 1: Write the proportion equation
   19,109.23 : 28,648.05 = 7,260.55 : x
2. Step 2: Convert to fraction form
   19,109.23/28,648.05 = 7,260.55/x
3. Step 3: Cross multiply
   19,109.23x = 28,648.05 × 7,260.55
4. Step 4: Simplify right side
   19,109.23x = 208,000,599.43
5. Step 5: Solve for x
   x = 208,000,599.43/19,109.23
6. Step 6: Final answer
   x = 10,884.82