Finding the Fourth Proportional to 103,616.17, 155,408.79 and 28,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   103,616.17 : 155,408.79 = 28,728.50 : x
2. Step 2: Convert to fraction form
   103,616.17/155,408.79 = 28,728.50/x
3. Step 3: Cross multiply
   103,616.17x = 155,408.79 × 28,728.50
4. Step 4: Simplify right side
   103,616.17x = 4,464,661,423.52
5. Step 5: Solve for x
   x = 4,464,661,423.52/103,616.17
6. Step 6: Final answer
   x = 43,088.46