Finding the Fourth Proportional to 10,112.20, 13,955.10 and 5,635.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,112.20 : 13,955.10 = 5,635.72 : x
2. Step 2: Convert to fraction form
   10,112.20/13,955.10 = 5,635.72/x
3. Step 3: Cross multiply
   10,112.20x = 13,955.10 × 5,635.72
4. Step 4: Simplify right side
   10,112.20x = 78,647,036.17
5. Step 5: Solve for x
   x = 78,647,036.17/10,112.20
6. Step 6: Final answer
   x = 7,777.44