Finding the Fourth Proportional to 279,435.72, 419,024.91 and 89,861.04

Step by Step Solution

1. Step 1: Write the proportion equation
   279,435.72 : 419,024.91 = 89,861.04 : x
2. Step 2: Convert to fraction form
   279,435.72/419,024.91 = 89,861.04/x
3. Step 3: Cross multiply
   279,435.72x = 419,024.91 × 89,861.04
4. Step 4: Simplify right side
   279,435.72x = 37,654,014,198.51
5. Step 5: Solve for x
   x = 37,654,014,198.51/279,435.72
6. Step 6: Final answer
   x = 134,750.18