Finding the Fourth Proportional to 90,643.59, 135,974.61 and 43,250.58

Step by Step Solution

1. Step 1: Write the proportion equation
   90,643.59 : 135,974.61 = 43,250.58 : x
2. Step 2: Convert to fraction form
   90,643.59/135,974.61 = 43,250.58/x
3. Step 3: Cross multiply
   90,643.59x = 135,974.61 × 43,250.58
4. Step 4: Simplify right side
   90,643.59x = 5,880,980,747.77
5. Step 5: Solve for x
   x = 5,880,980,747.77/90,643.59
6. Step 6: Final answer
   x = 64,880.27