Finding the Fourth Proportional to 13,215.61, 19,826.46 and 7,673.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,215.61 : 19,826.46 = 7,673.59 : x
2. Step 2: Convert to fraction form
   13,215.61/19,826.46 = 7,673.59/x
3. Step 3: Cross multiply
   13,215.61x = 19,826.46 × 7,673.59
4. Step 4: Simplify right side
   13,215.61x = 152,140,086.82
5. Step 5: Solve for x
   x = 152,140,086.82/13,215.61
6. Step 6: Final answer
   x = 11,512.15