Finding the Fourth Proportional to 28,093.62, 42,146.55 and 8,103

Step by Step Solution

1. Step 1: Write the proportion equation
   28,093.62 : 42,146.55 = 8,103 : x
2. Step 2: Convert to fraction form
   28,093.62/42,146.55 = 8,103/x
3. Step 3: Cross multiply
   28,093.62x = 42,146.55 × 8,103
4. Step 4: Simplify right side
   28,093.62x = 341,513,494.65
5. Step 5: Solve for x
   x = 341,513,494.65/28,093.62
6. Step 6: Final answer
   x = 12,156.27