Finding the Fourth Proportional to 13,588.74, 18,753.39 and 7,620.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,588.74 : 18,753.39 = 7,620.30 : x
2. Step 2: Convert to fraction form
   13,588.74/18,753.39 = 7,620.30/x
3. Step 3: Cross multiply
   13,588.74x = 18,753.39 × 7,620.30
4. Step 4: Simplify right side
   13,588.74x = 142,906,457.82
5. Step 5: Solve for x
   x = 142,906,457.82/13,588.74
6. Step 6: Final answer
   x = 10,516.53