Finding the Fourth Proportional to 90,914.18, 136,392.72 and 28,584.68

Step by Step Solution

1. Step 1: Write the proportion equation
   90,914.18 : 136,392.72 = 28,584.68 : x
2. Step 2: Convert to fraction form
   90,914.18/136,392.72 = 28,584.68/x
3. Step 3: Cross multiply
   90,914.18x = 136,392.72 × 28,584.68
4. Step 4: Simplify right side
   90,914.18x = 3,898,741,573.57
5. Step 5: Solve for x
   x = 3,898,741,573.57/90,914.18
6. Step 6: Final answer
   x = 42,883.76