Finding the Fourth Proportional to 21,068.82, 29,074.72 and 11,508.59

Step by Step Solution

1. Step 1: Write the proportion equation
   21,068.82 : 29,074.72 = 11,508.59 : x
2. Step 2: Convert to fraction form
   21,068.82/29,074.72 = 11,508.59/x
3. Step 3: Cross multiply
   21,068.82x = 29,074.72 × 11,508.59
4. Step 4: Simplify right side
   21,068.82x = 334,609,031.84
5. Step 5: Solve for x
   x = 334,609,031.84/21,068.82
6. Step 6: Final answer
   x = 15,881.72