Finding the Fourth Proportional to 21,760.90, 30,030.04 and 13,263

Step by Step Solution

1. Step 1: Write the proportion equation
   21,760.90 : 30,030.04 = 13,263 : x
2. Step 2: Convert to fraction form
   21,760.90/30,030.04 = 13,263/x
3. Step 3: Cross multiply
   21,760.90x = 30,030.04 × 13,263
4. Step 4: Simplify right side
   21,760.90x = 398,288,420.52
5. Step 5: Solve for x
   x = 398,288,420.52/21,760.90
6. Step 6: Final answer
   x = 18,302.94