Finding the Fourth Proportional to 21,558.96, 29,751.06 and 12,127.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,558.96 : 29,751.06 = 12,127.50 : x
2. Step 2: Convert to fraction form
   21,558.96/29,751.06 = 12,127.50/x
3. Step 3: Cross multiply
   21,558.96x = 29,751.06 × 12,127.50
4. Step 4: Simplify right side
   21,558.96x = 360,805,980.15
5. Step 5: Solve for x
   x = 360,805,980.15/21,558.96
6. Step 6: Final answer
   x = 16,735.78