Finding the Fourth Proportional to 279,063.82, 418,556.30 and 89,499.55

Step by Step Solution

1. Step 1: Write the proportion equation
   279,063.82 : 418,556.30 = 89,499.55 : x
2. Step 2: Convert to fraction form
   279,063.82/418,556.30 = 89,499.55/x
3. Step 3: Cross multiply
   279,063.82x = 418,556.30 × 89,499.55
4. Step 4: Simplify right side
   279,063.82x = 37,460,600,499.67
5. Step 5: Solve for x
   x = 37,460,600,499.67/279,063.82
6. Step 6: Final answer
   x = 134,236.68