Finding the Fourth Proportional to 90,838.14, 136,270.89 and 28,513.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,838.14 : 136,270.89 = 28,513.50 : x
2. Step 2: Convert to fraction form
   90,838.14/136,270.89 = 28,513.50/x
3. Step 3: Cross multiply
   90,838.14x = 136,270.89 × 28,513.50
4. Step 4: Simplify right side
   90,838.14x = 3,885,560,022.02
5. Step 5: Solve for x
   x = 3,885,560,022.02/90,838.14
6. Step 6: Final answer
   x = 42,774.54