Finding the Fourth Proportional to 231,990.42, 320,146.71 and 131,388.42

Step by Step Solution

1. Step 1: Write the proportion equation
   231,990.42 : 320,146.71 = 131,388.42 : x
2. Step 2: Convert to fraction form
   231,990.42/320,146.71 = 131,388.42/x
3. Step 3: Cross multiply
   231,990.42x = 320,146.71 × 131,388.42
4. Step 4: Simplify right side
   231,990.42x = 42,063,570,395.10
5. Step 5: Solve for x
   x = 42,063,570,395.10/231,990.42
6. Step 6: Final answer
   x = 181,315.98