Finding the Fourth Proportional to 28,622.85, 42,929.69 and 7,841.49

Step by Step Solution

1. Step 1: Write the proportion equation
   28,622.85 : 42,929.69 = 7,841.49 : x
2. Step 2: Convert to fraction form
   28,622.85/42,929.69 = 7,841.49/x
3. Step 3: Cross multiply
   28,622.85x = 42,929.69 × 7,841.49
4. Step 4: Simplify right side
   28,622.85x = 336,632,695.63
5. Step 5: Solve for x
   x = 336,632,695.63/28,622.85
6. Step 6: Final answer
   x = 11,760.98