Finding the Fourth Proportional to 19,357.48, 29,016.60 and 13,118.12

Step by Step Solution

1. Step 1: Write the proportion equation
   19,357.48 : 29,016.60 = 13,118.12 : x
2. Step 2: Convert to fraction form
   19,357.48/29,016.60 = 13,118.12/x
3. Step 3: Cross multiply
   19,357.48x = 29,016.60 × 13,118.12
4. Step 4: Simplify right side
   19,357.48x = 380,643,095.71
5. Step 5: Solve for x
   x = 380,643,095.71/19,357.48
6. Step 6: Final answer
   x = 19,663.88