Finding the Fourth Proportional to 10,112.55, 13,955.34 and 5,637.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,112.55 : 13,955.34 = 5,637.20 : x
2. Step 2: Convert to fraction form
   10,112.55/13,955.34 = 5,637.20/x
3. Step 3: Cross multiply
   10,112.55x = 13,955.34 × 5,637.20
4. Step 4: Simplify right side
   10,112.55x = 78,668,962.30
5. Step 5: Solve for x
   x = 78,668,962.30/10,112.55
6. Step 6: Final answer
   x = 7,779.34