Finding the Fourth Proportional to 11,388.16, 15,706.56 and 7,850.56

Step by Step Solution

1. Step 1: Write the proportion equation
   11,388.16 : 15,706.56 = 7,850.56 : x
2. Step 2: Convert to fraction form
   11,388.16/15,706.56 = 7,850.56/x
3. Step 3: Cross multiply
   11,388.16x = 15,706.56 × 7,850.56
4. Step 4: Simplify right side
   11,388.16x = 123,305,291.67
5. Step 5: Solve for x
   x = 123,305,291.67/11,388.16
6. Step 6: Final answer
   x = 10,827.50