Finding the Fourth Proportional to 10,388.16, 15,564.52 and 5,712.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,388.16 : 15,564.52 = 5,712.09 : x
2. Step 2: Convert to fraction form
   10,388.16/15,564.52 = 5,712.09/x
3. Step 3: Cross multiply
   10,388.16x = 15,564.52 × 5,712.09
4. Step 4: Simplify right side
   10,388.16x = 88,905,910.49
5. Step 5: Solve for x
   x = 88,905,910.49/10,388.16
6. Step 6: Final answer
   x = 8,558.39