Finding the Fourth Proportional to 21,436.73, 29,566.42 and 18,779.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,436.73 : 29,566.42 = 18,779.52 : x
2. Step 2: Convert to fraction form
   21,436.73/29,566.42 = 18,779.52/x
3. Step 3: Cross multiply
   21,436.73x = 29,566.42 × 18,779.52
4. Step 4: Simplify right side
   21,436.73x = 555,243,175.72
5. Step 5: Solve for x
   x = 555,243,175.72/21,436.73
6. Step 6: Final answer
   x = 25,901.49