Finding the Fourth Proportional to 131,806.38, 181,895.31 and 72,190.38

Step by Step Solution

1. Step 1: Write the proportion equation
   131,806.38 : 181,895.31 = 72,190.38 : x
2. Step 2: Convert to fraction form
   131,806.38/181,895.31 = 72,190.38/x
3. Step 3: Cross multiply
   131,806.38x = 181,895.31 × 72,190.38
4. Step 4: Simplify right side
   131,806.38x = 13,131,091,549.12
5. Step 5: Solve for x
   x = 13,131,091,549.12/131,806.38
6. Step 6: Final answer
   x = 99,624.10