Finding the Fourth Proportional to 21,635.56, 29,861.88 and 14,068.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,635.56 : 29,861.88 = 14,068.72 : x
2. Step 2: Convert to fraction form
   21,635.56/29,861.88 = 14,068.72/x
3. Step 3: Cross multiply
   21,635.56x = 29,861.88 × 14,068.72
4. Step 4: Simplify right side
   21,635.56x = 420,118,428.39
5. Step 5: Solve for x
   x = 420,118,428.39/21,635.56
6. Step 6: Final answer
   x = 19,417.96