Finding the Fourth Proportional to 39,051.29, 53,890.71 and 21,146.33

Step by Step Solution

1. Step 1: Write the proportion equation
   39,051.29 : 53,890.71 = 21,146.33 : x
2. Step 2: Convert to fraction form
   39,051.29/53,890.71 = 21,146.33/x
3. Step 3: Cross multiply
   39,051.29x = 53,890.71 × 21,146.33
4. Step 4: Simplify right side
   39,051.29x = 1,139,590,737.59
5. Step 5: Solve for x
   x = 1,139,590,737.59/39,051.29
6. Step 6: Final answer
   x = 29,181.90