Finding the Fourth Proportional to 21,059.55, 29,093.88 and 13,808.87

Step by Step Solution

1. Step 1: Write the proportion equation
   21,059.55 : 29,093.88 = 13,808.87 : x
2. Step 2: Convert to fraction form
   21,059.55/29,093.88 = 13,808.87/x
3. Step 3: Cross multiply
   21,059.55x = 29,093.88 × 13,808.87
4. Step 4: Simplify right side
   21,059.55x = 401,753,461.25
5. Step 5: Solve for x
   x = 401,753,461.25/21,059.55
6. Step 6: Final answer
   x = 19,077.02