Finding the Fourth Proportional to 28,191.24, 42,308.16 and 19,285.32

Step by Step Solution

1. Step 1: Write the proportion equation
   28,191.24 : 42,308.16 = 19,285.32 : x
2. Step 2: Convert to fraction form
   28,191.24/42,308.16 = 19,285.32/x
3. Step 3: Cross multiply
   28,191.24x = 42,308.16 × 19,285.32
4. Step 4: Simplify right side
   28,191.24x = 815,926,404.21
5. Step 5: Solve for x
   x = 815,926,404.21/28,191.24
6. Step 6: Final answer
   x = 28,942.55