Finding the Fourth Proportional to 28,081.68, 42,105.24 and 19,327.44

Step by Step Solution

1. Step 1: Write the proportion equation
   28,081.68 : 42,105.24 = 19,327.44 : x
2. Step 2: Convert to fraction form
   28,081.68/42,105.24 = 19,327.44/x
3. Step 3: Cross multiply
   28,081.68x = 42,105.24 × 19,327.44
4. Step 4: Simplify right side
   28,081.68x = 813,786,499.79
5. Step 5: Solve for x
   x = 813,786,499.79/28,081.68
6. Step 6: Final answer
   x = 28,979.27