Finding the Fourth Proportional to 21,005.24, 29,015.55 and 19,510.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,005.24 : 29,015.55 = 19,510.55 : x
2. Step 2: Convert to fraction form
   21,005.24/29,015.55 = 19,510.55/x
3. Step 3: Cross multiply
   21,005.24x = 29,015.55 × 19,510.55
4. Step 4: Simplify right side
   21,005.24x = 566,109,466.00
5. Step 5: Solve for x
   x = 566,109,466.00/21,005.24
6. Step 6: Final answer
   x = 26,950.87