Finding the Fourth Proportional to 12,698.76, 19,042.05 and 7,288.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,698.76 : 19,042.05 = 7,288.59 : x
2. Step 2: Convert to fraction form
   12,698.76/19,042.05 = 7,288.59/x
3. Step 3: Cross multiply
   12,698.76x = 19,042.05 × 7,288.59
4. Step 4: Simplify right side
   12,698.76x = 138,789,695.21
5. Step 5: Solve for x
   x = 138,789,695.21/12,698.76
6. Step 6: Final answer
   x = 10,929.39