Finding the Fourth Proportional to 231,931, 320,064.78 and 131,348.44

Step by Step Solution

1. Step 1: Write the proportion equation
   231,931 : 320,064.78 = 131,348.44 : x
2. Step 2: Convert to fraction form
   231,931/320,064.78 = 131,348.44/x
3. Step 3: Cross multiply
   231,931x = 320,064.78 × 131,348.44
4. Step 4: Simplify right side
   231,931x = 42,040,009,551.94
5. Step 5: Solve for x
   x = 42,040,009,551.94/231,931
6. Step 6: Final answer
   x = 181,260.85