Finding the Fourth Proportional to 21,613.50, 29,826.63 and 11,677.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,613.50 : 29,826.63 = 11,677.50 : x
2. Step 2: Convert to fraction form
   21,613.50/29,826.63 = 11,677.50/x
3. Step 3: Cross multiply
   21,613.50x = 29,826.63 × 11,677.50
4. Step 4: Simplify right side
   21,613.50x = 348,300,471.83
5. Step 5: Solve for x
   x = 348,300,471.83/21,613.50
6. Step 6: Final answer
   x = 16,114.95