Finding the Fourth Proportional to 39,667.59, 54,738.50 and 21,762.18

Step by Step Solution

1. Step 1: Write the proportion equation
   39,667.59 : 54,738.50 = 21,762.18 : x
2. Step 2: Convert to fraction form
   39,667.59/54,738.50 = 21,762.18/x
3. Step 3: Cross multiply
   39,667.59x = 54,738.50 × 21,762.18
4. Step 4: Simplify right side
   39,667.59x = 1,191,228,981.12
5. Step 5: Solve for x
   x = 1,191,228,981.12/39,667.59
6. Step 6: Final answer
   x = 30,030.28