Finding the Fourth Proportional to 28,081.58, 42,121.04 and 7,021.76

Step by Step Solution

1. Step 1: Write the proportion equation
   28,081.58 : 42,121.04 = 7,021.76 : x
2. Step 2: Convert to fraction form
   28,081.58/42,121.04 = 7,021.76/x
3. Step 3: Cross multiply
   28,081.58x = 42,121.04 × 7,021.76
4. Step 4: Simplify right side
   28,081.58x = 295,763,833.83
5. Step 5: Solve for x
   x = 295,763,833.83/28,081.58
6. Step 6: Final answer
   x = 10,532.31