Finding the Fourth Proportional to 19,870.32, 27,419.34 and 11,372.52

Step by Step Solution

1. Step 1: Write the proportion equation
   19,870.32 : 27,419.34 = 11,372.52 : x
2. Step 2: Convert to fraction form
   19,870.32/27,419.34 = 11,372.52/x
3. Step 3: Cross multiply
   19,870.32x = 27,419.34 × 11,372.52
4. Step 4: Simplify right side
   19,870.32x = 311,826,992.54
5. Step 5: Solve for x
   x = 311,826,992.54/19,870.32
6. Step 6: Final answer
   x = 15,693.10