Finding the Fourth Proportional to 90,824.50, 136,258.62 and 28,495

Step by Step Solution

1. Step 1: Write the proportion equation
   90,824.50 : 136,258.62 = 28,495 : x
2. Step 2: Convert to fraction form
   90,824.50/136,258.62 = 28,495/x
3. Step 3: Cross multiply
   90,824.50x = 136,258.62 × 28,495
4. Step 4: Simplify right side
   90,824.50x = 3,882,689,376.90
5. Step 5: Solve for x
   x = 3,882,689,376.90/90,824.50
6. Step 6: Final answer
   x = 42,749.36