Finding the Fourth Proportional to 28,103.09, 42,145.31 and 9,377.91

Step by Step Solution

1. Step 1: Write the proportion equation
   28,103.09 : 42,145.31 = 9,377.91 : x
2. Step 2: Convert to fraction form
   28,103.09/42,145.31 = 9,377.91/x
3. Step 3: Cross multiply
   28,103.09x = 42,145.31 × 9,377.91
4. Step 4: Simplify right side
   28,103.09x = 395,234,947.55
5. Step 5: Solve for x
   x = 395,234,947.55/28,103.09
6. Step 6: Final answer
   x = 14,063.76