Finding the Fourth Proportional to 21,063.38, 29,071.54 and 13,880.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,063.38 : 29,071.54 = 13,880.72 : x
2. Step 2: Convert to fraction form
   21,063.38/29,071.54 = 13,880.72/x
3. Step 3: Cross multiply
   21,063.38x = 29,071.54 × 13,880.72
4. Step 4: Simplify right side
   21,063.38x = 403,533,906.71
5. Step 5: Solve for x
   x = 403,533,906.71/21,063.38
6. Step 6: Final answer
   x = 19,158.08