Finding the Fourth Proportional to 13,758.32, 18,986.52 and 7,470.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,758.32 : 18,986.52 = 7,470.72 : x
2. Step 2: Convert to fraction form
   13,758.32/18,986.52 = 7,470.72/x
3. Step 3: Cross multiply
   13,758.32x = 18,986.52 × 7,470.72
4. Step 4: Simplify right side
   13,758.32x = 141,842,974.69
5. Step 5: Solve for x
   x = 141,842,974.69/13,758.32
6. Step 6: Final answer
   x = 10,309.61