Finding the Fourth Proportional to 28,079.83, 42,119.58 and 7,019.77

Step by Step Solution

1. Step 1: Write the proportion equation
   28,079.83 : 42,119.58 = 7,019.77 : x
2. Step 2: Convert to fraction form
   28,079.83/42,119.58 = 7,019.77/x
3. Step 3: Cross multiply
   28,079.83x = 42,119.58 × 7,019.77
4. Step 4: Simplify right side
   28,079.83x = 295,669,729.00
5. Step 5: Solve for x
   x = 295,669,729.00/28,079.83
6. Step 6: Final answer
   x = 10,529.61