Finding the Fourth Proportional to 19,410.83, 29,118.17 and 7,721.31

Step by Step Solution

1. Step 1: Write the proportion equation
   19,410.83 : 29,118.17 = 7,721.31 : x
2. Step 2: Convert to fraction form
   19,410.83/29,118.17 = 7,721.31/x
3. Step 3: Cross multiply
   19,410.83x = 29,118.17 × 7,721.31
4. Step 4: Simplify right side
   19,410.83x = 224,830,417.20
5. Step 5: Solve for x
   x = 224,830,417.20/19,410.83
6. Step 6: Final answer
   x = 11,582.73