Finding the Fourth Proportional to 13,012.38, 19,518.53 and 3,151.65

Step by Step Solution

1. Step 1: Write the proportion equation
   13,012.38 : 19,518.53 = 3,151.65 : x
2. Step 2: Convert to fraction form
   13,012.38/19,518.53 = 3,151.65/x
3. Step 3: Cross multiply
   13,012.38x = 19,518.53 × 3,151.65
4. Step 4: Simplify right side
   13,012.38x = 61,515,559.32
5. Step 5: Solve for x
   x = 61,515,559.32/13,012.38
6. Step 6: Final answer
   x = 4,727.46