Finding the Fourth Proportional to 21,558.23, 29,744.52 and 12,607.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,558.23 : 29,744.52 = 12,607.94 : x
2. Step 2: Convert to fraction form
   21,558.23/29,744.52 = 12,607.94/x
3. Step 3: Cross multiply
   21,558.23x = 29,744.52 × 12,607.94
4. Step 4: Simplify right side
   21,558.23x = 375,017,123.49
5. Step 5: Solve for x
   x = 375,017,123.49/21,558.23
6. Step 6: Final answer
   x = 17,395.54