Finding the Fourth Proportional to 128,981.10, 193,143.60 and 123,076.20

Step by Step Solution

1. Step 1: Write the proportion equation
   128,981.10 : 193,143.60 = 123,076.20 : x
2. Step 2: Convert to fraction form
   128,981.10/193,143.60 = 123,076.20/x
3. Step 3: Cross multiply
   128,981.10x = 193,143.60 × 123,076.20
4. Step 4: Simplify right side
   128,981.10x = 23,771,380,342.32
5. Step 5: Solve for x
   x = 23,771,380,342.32/128,981.10
6. Step 6: Final answer
   x = 184,301.27