Finding the Fourth Proportional to 21,875, 30,187.50 and 13,496.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,875 : 30,187.50 = 13,496.36 : x
2. Step 2: Convert to fraction form
   21,875/30,187.50 = 13,496.36/x
3. Step 3: Cross multiply
   21,875x = 30,187.50 × 13,496.36
4. Step 4: Simplify right side
   21,875x = 407,421,367.50
5. Step 5: Solve for x
   x = 407,421,367.50/21,875
6. Step 6: Final answer
   x = 18,624.98