Finding the Fourth Proportional to 13,756.96, 18,987.42 and 7,788.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,756.96 : 18,987.42 = 7,788.88 : x
2. Step 2: Convert to fraction form
   13,756.96/18,987.42 = 7,788.88/x
3. Step 3: Cross multiply
   13,756.96x = 18,987.42 × 7,788.88
4. Step 4: Simplify right side
   13,756.96x = 147,890,735.89
5. Step 5: Solve for x
   x = 147,890,735.89/13,756.96
6. Step 6: Final answer
   x = 10,750.25