Finding the Fourth Proportional to 231,931.03, 320,059.41 and 136,443.88

Step by Step Solution

1. Step 1: Write the proportion equation
   231,931.03 : 320,059.41 = 136,443.88 : x
2. Step 2: Convert to fraction form
   231,931.03/320,059.41 = 136,443.88/x
3. Step 3: Cross multiply
   231,931.03x = 320,059.41 × 136,443.88
4. Step 4: Simplify right side
   231,931.03x = 43,670,147,730.91
5. Step 5: Solve for x
   x = 43,670,147,730.91/231,931.03
6. Step 6: Final answer
   x = 188,289.37