Finding the Fourth Proportional to 90,356.58, 135,535.95 and 42,976.71

Step by Step Solution

1. Step 1: Write the proportion equation
   90,356.58 : 135,535.95 = 42,976.71 : x
2. Step 2: Convert to fraction form
   90,356.58/135,535.95 = 42,976.71/x
3. Step 3: Cross multiply
   90,356.58x = 135,535.95 × 42,976.71
4. Step 4: Simplify right side
   90,356.58x = 5,824,889,217.72
5. Step 5: Solve for x
   x = 5,824,889,217.72/90,356.58
6. Step 6: Final answer
   x = 64,465.58