Finding the Fourth Proportional to 231,051.38, 318,839.42 and 129,056.51

Step by Step Solution

1. Step 1: Write the proportion equation
   231,051.38 : 318,839.42 = 129,056.51 : x
2. Step 2: Convert to fraction form
   231,051.38/318,839.42 = 129,056.51/x
3. Step 3: Cross multiply
   231,051.38x = 318,839.42 × 129,056.51
4. Step 4: Simplify right side
   231,051.38x = 41,148,300,556.14
5. Step 5: Solve for x
   x = 41,148,300,556.14/231,051.38
6. Step 6: Final answer
   x = 178,091.56