Finding the Fourth Proportional to 30,474.42, 42,055.38 and 21,537.69

Step by Step Solution

1. Step 1: Write the proportion equation
   30,474.42 : 42,055.38 = 21,537.69 : x
2. Step 2: Convert to fraction form
   30,474.42/42,055.38 = 21,537.69/x
3. Step 3: Cross multiply
   30,474.42x = 42,055.38 × 21,537.69
4. Step 4: Simplify right side
   30,474.42x = 905,775,737.27
5. Step 5: Solve for x
   x = 905,775,737.27/30,474.42
6. Step 6: Final answer
   x = 29,722.49