Finding the Fourth Proportional to 21,451.83, 29,598.69 and 12,955.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,451.83 : 29,598.69 = 12,955.33 : x
2. Step 2: Convert to fraction form
   21,451.83/29,598.69 = 12,955.33/x
3. Step 3: Cross multiply
   21,451.83x = 29,598.69 × 12,955.33
4. Step 4: Simplify right side
   21,451.83x = 383,460,796.52
5. Step 5: Solve for x
   x = 383,460,796.52/21,451.83
6. Step 6: Final answer
   x = 17,875.44