Finding the Fourth Proportional to 13,641.50, 18,822.03 and 7,671.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,641.50 : 18,822.03 = 7,671.98 : x
2. Step 2: Convert to fraction form
   13,641.50/18,822.03 = 7,671.98/x
3. Step 3: Cross multiply
   13,641.50x = 18,822.03 × 7,671.98
4. Step 4: Simplify right side
   13,641.50x = 144,402,237.72
5. Step 5: Solve for x
   x = 144,402,237.72/13,641.50
6. Step 6: Final answer
   x = 10,585.51