Finding the Fourth Proportional to 123,390.16, 184,874.59 and 67,129.81

Step by Step Solution

1. Step 1: Write the proportion equation
   123,390.16 : 184,874.59 = 67,129.81 : x
2. Step 2: Convert to fraction form
   123,390.16/184,874.59 = 67,129.81/x
3. Step 3: Cross multiply
   123,390.16x = 184,874.59 × 67,129.81
4. Step 4: Simplify right side
   123,390.16x = 12,410,596,100.53
5. Step 5: Solve for x
   x = 12,410,596,100.53/123,390.16
6. Step 6: Final answer
   x = 100,580.11