Finding the Fourth Proportional to 13,588.56, 20,383.25 and 7,665.84

Step by Step Solution

1. Step 1: Write the proportion equation
   13,588.56 : 20,383.25 = 7,665.84 : x
2. Step 2: Convert to fraction form
   13,588.56/20,383.25 = 7,665.84/x
3. Step 3: Cross multiply
   13,588.56x = 20,383.25 × 7,665.84
4. Step 4: Simplify right side
   13,588.56x = 156,254,694.85
5. Step 5: Solve for x
   x = 156,254,694.85/13,588.56
6. Step 6: Final answer
   x = 11,498.99