Finding the Fourth Proportional to 14,667.18, 21,948.21 and 12,699.59

Step by Step Solution

1. Step 1: Write the proportion equation
   14,667.18 : 21,948.21 = 12,699.59 : x
2. Step 2: Convert to fraction form
   14,667.18/21,948.21 = 12,699.59/x
3. Step 3: Cross multiply
   14,667.18x = 21,948.21 × 12,699.59
4. Step 4: Simplify right side
   14,667.18x = 278,733,323.10
5. Step 5: Solve for x
   x = 278,733,323.10/14,667.18
6. Step 6: Final answer
   x = 19,003.88