Finding the Fourth Proportional to 39,667.34, 54,741.35 and 21,761.89

Step by Step Solution

1. Step 1: Write the proportion equation
   39,667.34 : 54,741.35 = 21,761.89 : x
2. Step 2: Convert to fraction form
   39,667.34/54,741.35 = 21,761.89/x
3. Step 3: Cross multiply
   39,667.34x = 54,741.35 × 21,761.89
4. Step 4: Simplify right side
   39,667.34x = 1,191,275,237.15
5. Step 5: Solve for x
   x = 1,191,275,237.15/39,667.34
6. Step 6: Final answer
   x = 30,031.64