Finding the Fourth Proportional to 279,436.68, 419,164.94 and 89,871.62

Step by Step Solution

1. Step 1: Write the proportion equation
   279,436.68 : 419,164.94 = 89,871.62 : x
2. Step 2: Convert to fraction form
   279,436.68/419,164.94 = 89,871.62/x
3. Step 3: Cross multiply
   279,436.68x = 419,164.94 × 89,871.62
4. Step 4: Simplify right side
   279,436.68x = 37,671,030,333.86
5. Step 5: Solve for x
   x = 37,671,030,333.86/279,436.68
6. Step 6: Final answer
   x = 134,810.61