Finding the Fourth Proportional to 21,384.90, 29,510.73 and 13,004.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,384.90 : 29,510.73 = 13,004.10 : x
2. Step 2: Convert to fraction form
   21,384.90/29,510.73 = 13,004.10/x
3. Step 3: Cross multiply
   21,384.90x = 29,510.73 × 13,004.10
4. Step 4: Simplify right side
   21,384.90x = 383,760,483.99
5. Step 5: Solve for x
   x = 383,760,483.99/21,384.90
6. Step 6: Final answer
   x = 17,945.40