Finding the Fourth Proportional to 279,498.32, 419,188.59 and 89,975.60

Step by Step Solution

1. Step 1: Write the proportion equation
   279,498.32 : 419,188.59 = 89,975.60 : x
2. Step 2: Convert to fraction form
   279,498.32/419,188.59 = 89,975.60/x
3. Step 3: Cross multiply
   279,498.32x = 419,188.59 × 89,975.60
4. Step 4: Simplify right side
   279,498.32x = 37,716,744,898.40
5. Step 5: Solve for x
   x = 37,716,744,898.40/279,498.32
6. Step 6: Final answer
   x = 134,944.44