Finding the Fourth Proportional to 21,410, 29,535.82 and 13,858.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,410 : 29,535.82 = 13,858.76 : x
2. Step 2: Convert to fraction form
   21,410/29,535.82 = 13,858.76/x
3. Step 3: Cross multiply
   21,410x = 29,535.82 × 13,858.76
4. Step 4: Simplify right side
   21,410x = 409,329,840.78
5. Step 5: Solve for x
   x = 409,329,840.78/21,410
6. Step 6: Final answer
   x = 19,118.63