Finding the Fourth Proportional to 128,982.10, 193,145.10 and 123,077.20

Step by Step Solution

1. Step 1: Write the proportion equation
   128,982.10 : 193,145.10 = 123,077.20 : x
2. Step 2: Convert to fraction form
   128,982.10/193,145.10 = 123,077.20/x
3. Step 3: Cross multiply
   128,982.10x = 193,145.10 × 123,077.20
4. Step 4: Simplify right side
   128,982.10x = 23,771,758,101.72
5. Step 5: Solve for x
   x = 23,771,758,101.72/128,982.10
6. Step 6: Final answer
   x = 184,302.77