Finding the Fourth Proportional to 145,111.76, 200,243.24 and 81,437.25

Step by Step Solution

1. Step 1: Write the proportion equation
   145,111.76 : 200,243.24 = 81,437.25 : x
2. Step 2: Convert to fraction form
   145,111.76/200,243.24 = 81,437.25/x
3. Step 3: Cross multiply
   145,111.76x = 200,243.24 × 81,437.25
4. Step 4: Simplify right side
   145,111.76x = 16,307,258,389.50
5. Step 5: Solve for x
   x = 16,307,258,389.50/145,111.76
6. Step 6: Final answer
   x = 112,377.24