Finding the Fourth Proportional to 21,667.76, 32,495.20 and 9,187.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667.76 : 32,495.20 = 9,187.60 : x
2. Step 2: Convert to fraction form
   21,667.76/32,495.20 = 9,187.60/x
3. Step 3: Cross multiply
   21,667.76x = 32,495.20 × 9,187.60
4. Step 4: Simplify right side
   21,667.76x = 298,552,899.52
5. Step 5: Solve for x
   x = 298,552,899.52/21,667.76
6. Step 6: Final answer
   x = 13,778.67