Finding the Fourth Proportional to 19,788.15, 29,674.25 and 7,134.30

Step by Step Solution

1. Step 1: Write the proportion equation
   19,788.15 : 29,674.25 = 7,134.30 : x
2. Step 2: Convert to fraction form
   19,788.15/29,674.25 = 7,134.30/x
3. Step 3: Cross multiply
   19,788.15x = 29,674.25 × 7,134.30
4. Step 4: Simplify right side
   19,788.15x = 211,705,076.32
5. Step 5: Solve for x
   x = 211,705,076.32/19,788.15
6. Step 6: Final answer
   x = 10,698.58