Finding the Fourth Proportional to 20,411.99, 30,620.72 and 7,264.47

Step by Step Solution

1. Step 1: Write the proportion equation
   20,411.99 : 30,620.72 = 7,264.47 : x
2. Step 2: Convert to fraction form
   20,411.99/30,620.72 = 7,264.47/x
3. Step 3: Cross multiply
   20,411.99x = 30,620.72 × 7,264.47
4. Step 4: Simplify right side
   20,411.99x = 222,443,301.82
5. Step 5: Solve for x
   x = 222,443,301.82/20,411.99
6. Step 6: Final answer
   x = 10,897.68