Finding the Fourth Proportional to 13,758.02, 18,986.52 and 7,789.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,758.02 : 18,986.52 = 7,789.56 : x
2. Step 2: Convert to fraction form
   13,758.02/18,986.52 = 7,789.56/x
3. Step 3: Cross multiply
   13,758.02x = 18,986.52 × 7,789.56
4. Step 4: Simplify right side
   13,758.02x = 147,896,660.46
5. Step 5: Solve for x
   x = 147,896,660.46/13,758.02
6. Step 6: Final answer
   x = 10,749.85