Finding the Fourth Proportional to 13,216.84, 19,818.98 and 7,671.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,216.84 : 19,818.98 = 7,671.89 : x
2. Step 2: Convert to fraction form
   13,216.84/19,818.98 = 7,671.89/x
3. Step 3: Cross multiply
   13,216.84x = 19,818.98 × 7,671.89
4. Step 4: Simplify right side
   13,216.84x = 152,048,954.56
5. Step 5: Solve for x
   x = 152,048,954.56/13,216.84
6. Step 6: Final answer
   x = 11,504.18