Finding the Fourth Proportional to 30,513.69, 42,087.15 and 28,003.91

Step by Step Solution

1. Step 1: Write the proportion equation
   30,513.69 : 42,087.15 = 28,003.91 : x
2. Step 2: Convert to fraction form
   30,513.69/42,087.15 = 28,003.91/x
3. Step 3: Cross multiply
   30,513.69x = 42,087.15 × 28,003.91
4. Step 4: Simplify right side
   30,513.69x = 1,178,604,550.32
5. Step 5: Solve for x
   x = 1,178,604,550.32/30,513.69
6. Step 6: Final answer
   x = 38,625.44