Finding the Fourth Proportional to 123,181.83, 184,689.72 and 99,518.49

Step by Step Solution

1. Step 1: Write the proportion equation
   123,181.83 : 184,689.72 = 99,518.49 : x
2. Step 2: Convert to fraction form
   123,181.83/184,689.72 = 99,518.49/x
3. Step 3: Cross multiply
   123,181.83x = 184,689.72 × 99,518.49
4. Step 4: Simplify right side
   123,181.83x = 18,380,042,052.92
5. Step 5: Solve for x
   x = 18,380,042,052.92/123,181.83
6. Step 6: Final answer
   x = 149,210.66