Finding the Fourth Proportional to 39,017.86, 53,844.41 and 21,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,017.86 : 53,844.41 = 21,112.72 : x
2. Step 2: Convert to fraction form
   39,017.86/53,844.41 = 21,112.72/x
3. Step 3: Cross multiply
   39,017.86x = 53,844.41 × 21,112.72
4. Step 4: Simplify right side
   39,017.86x = 1,136,801,870.07
5. Step 5: Solve for x
   x = 1,136,801,870.07/39,017.86
6. Step 6: Final answer
   x = 29,135.43