Finding the Fourth Proportional to 39,667.84, 54,742.80 and 21,763.96

Step by Step Solution

1. Step 1: Write the proportion equation
   39,667.84 : 54,742.80 = 21,763.96 : x
2. Step 2: Convert to fraction form
   39,667.84/54,742.80 = 21,763.96/x
3. Step 3: Cross multiply
   39,667.84x = 54,742.80 × 21,763.96
4. Step 4: Simplify right side
   39,667.84x = 1,191,420,109.49
5. Step 5: Solve for x
   x = 1,191,420,109.49/39,667.84
6. Step 6: Final answer
   x = 30,034.91