Finding the Fourth Proportional to 21,060.58, 29,056.59 and 13,894.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,060.58 : 29,056.59 = 13,894.06 : x
2. Step 2: Convert to fraction form
   21,060.58/29,056.59 = 13,894.06/x
3. Step 3: Cross multiply
   21,060.58x = 29,056.59 × 13,894.06
4. Step 4: Simplify right side
   21,060.58x = 403,713,934.28
5. Step 5: Solve for x
   x = 403,713,934.28/21,060.58
6. Step 6: Final answer
   x = 19,169.17