Finding the Fourth Proportional to 36,715.68, 50,667.84 and 21,609

Step by Step Solution

1. Step 1: Write the proportion equation
   36,715.68 : 50,667.84 = 21,609 : x
2. Step 2: Convert to fraction form
   36,715.68/50,667.84 = 21,609/x
3. Step 3: Cross multiply
   36,715.68x = 50,667.84 × 21,609
4. Step 4: Simplify right side
   36,715.68x = 1,094,881,354.56
5. Step 5: Solve for x
   x = 1,094,881,354.56/36,715.68
6. Step 6: Final answer
   x = 29,820.54