Finding the Fourth Proportional to 103,155.98, 154,732.68 and 28,276.05

Step by Step Solution

1. Step 1: Write the proportion equation
   103,155.98 : 154,732.68 = 28,276.05 : x
2. Step 2: Convert to fraction form
   103,155.98/154,732.68 = 28,276.05/x
3. Step 3: Cross multiply
   103,155.98x = 154,732.68 × 28,276.05
4. Step 4: Simplify right side
   103,155.98x = 4,375,228,996.31
5. Step 5: Solve for x
   x = 4,375,228,996.31/103,155.98
6. Step 6: Final answer
   x = 42,413.72