Finding the Fourth Proportional to 13,588.72, 18,752.14 and 7,620.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,588.72 : 18,752.14 = 7,620.25 : x
2. Step 2: Convert to fraction form
   13,588.72/18,752.14 = 7,620.25/x
3. Step 3: Cross multiply
   13,588.72x = 18,752.14 × 7,620.25
4. Step 4: Simplify right side
   13,588.72x = 142,895,994.84
5. Step 5: Solve for x
   x = 142,895,994.84/13,588.72
6. Step 6: Final answer
   x = 10,515.78