Finding the Fourth Proportional to 276,819, 415,405.11 and 99,322.08

Step by Step Solution

1. Step 1: Write the proportion equation
   276,819 : 415,405.11 = 99,322.08 : x
2. Step 2: Convert to fraction form
   276,819/415,405.11 = 99,322.08/x
3. Step 3: Cross multiply
   276,819x = 415,405.11 × 99,322.08
4. Step 4: Simplify right side
   276,819x = 41,258,899,567.83
5. Step 5: Solve for x
   x = 41,258,899,567.83/276,819
6. Step 6: Final answer
   x = 149,046.49