Finding the Fourth Proportional to 39,867.75, 55,017.23 and 21,962.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,867.75 : 55,017.23 = 21,962.34 : x
2. Step 2: Convert to fraction form
   39,867.75/55,017.23 = 21,962.34/x
3. Step 3: Cross multiply
   39,867.75x = 55,017.23 × 21,962.34
4. Step 4: Simplify right side
   39,867.75x = 1,208,307,111.12
5. Step 5: Solve for x
   x = 1,208,307,111.12/39,867.75
6. Step 6: Final answer
   x = 30,307.88