Finding the Fourth Proportional to 13,110.53, 19,673.69 and 5,211.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,110.53 : 19,673.69 = 5,211.61 : x
2. Step 2: Convert to fraction form
   13,110.53/19,673.69 = 5,211.61/x
3. Step 3: Cross multiply
   13,110.53x = 19,673.69 × 5,211.61
4. Step 4: Simplify right side
   13,110.53x = 102,531,524.30
5. Step 5: Solve for x
   x = 102,531,524.30/13,110.53
6. Step 6: Final answer
   x = 7,820.55