Finding the Fourth Proportional to 21,667.50, 32,501.39 and 7,816.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667.50 : 32,501.39 = 7,816.50 : x
2. Step 2: Convert to fraction form
   21,667.50/32,501.39 = 7,816.50/x
3. Step 3: Cross multiply
   21,667.50x = 32,501.39 × 7,816.50
4. Step 4: Simplify right side
   21,667.50x = 254,047,075.85
5. Step 5: Solve for x
   x = 254,047,075.85/21,667.50
6. Step 6: Final answer
   x = 11,724.80