Finding the Fourth Proportional to 13,758.48, 18,986.78 and 7,470.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,758.48 : 18,986.78 = 7,470.86 : x
2. Step 2: Convert to fraction form
   13,758.48/18,986.78 = 7,470.86/x
3. Step 3: Cross multiply
   13,758.48x = 18,986.78 × 7,470.86
4. Step 4: Simplify right side
   13,758.48x = 141,847,575.23
5. Step 5: Solve for x
   x = 141,847,575.23/13,758.48
6. Step 6: Final answer
   x = 10,309.83