Finding the Fourth Proportional to 39,464.78, 54,462.71 and 21,561.45

Step by Step Solution

1. Step 1: Write the proportion equation
   39,464.78 : 54,462.71 = 21,561.45 : x
2. Step 2: Convert to fraction form
   39,464.78/54,462.71 = 21,561.45/x
3. Step 3: Cross multiply
   39,464.78x = 54,462.71 × 21,561.45
4. Step 4: Simplify right side
   39,464.78x = 1,174,294,890.72
5. Step 5: Solve for x
   x = 1,174,294,890.72/39,464.78
6. Step 6: Final answer
   x = 29,755.52