Finding the Fourth Proportional to 233,112.16, 321,686.88 and 131,139.60

Step by Step Solution

1. Step 1: Write the proportion equation
   233,112.16 : 321,686.88 = 131,139.60 : x
2. Step 2: Convert to fraction form
   233,112.16/321,686.88 = 131,139.60/x
3. Step 3: Cross multiply
   233,112.16x = 321,686.88 × 131,139.60
4. Step 4: Simplify right side
   233,112.16x = 42,185,888,768.45
5. Step 5: Solve for x
   x = 42,185,888,768.45/233,112.16
6. Step 6: Final answer
   x = 180,968.20