Finding the Fourth Proportional to 19,081.50, 28,622.79 and 5,230.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,081.50 : 28,622.79 = 5,230.50 : x
2. Step 2: Convert to fraction form
   19,081.50/28,622.79 = 5,230.50/x
3. Step 3: Cross multiply
   19,081.50x = 28,622.79 × 5,230.50
4. Step 4: Simplify right side
   19,081.50x = 149,711,503.10
5. Step 5: Solve for x
   x = 149,711,503.10/19,081.50
6. Step 6: Final answer
   x = 7,845.90