Finding the Fourth Proportional to 21,054.32, 29,054.94 and 12,103.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,054.32 : 29,054.94 = 12,103.56 : x
2. Step 2: Convert to fraction form
   21,054.32/29,054.94 = 12,103.56/x
3. Step 3: Cross multiply
   21,054.32x = 29,054.94 × 12,103.56
4. Step 4: Simplify right side
   21,054.32x = 351,668,209.59
5. Step 5: Solve for x
   x = 351,668,209.59/21,054.32
6. Step 6: Final answer
   x = 16,702.90