Finding the Fourth Proportional to 13,758.82, 18,987.20 and 7,790.83

Step by Step Solution

1. Step 1: Write the proportion equation
   13,758.82 : 18,987.20 = 7,790.83 : x
2. Step 2: Convert to fraction form
   13,758.82/18,987.20 = 7,790.83/x
3. Step 3: Cross multiply
   13,758.82x = 18,987.20 × 7,790.83
4. Step 4: Simplify right side
   13,758.82x = 147,926,008.42
5. Step 5: Solve for x
   x = 147,926,008.42/13,758.82
6. Step 6: Final answer
   x = 10,751.36