Finding the Fourth Proportional to 31,938.81, 43,756.38 and 30,741.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,938.81 : 43,756.38 = 30,741.68 : x
2. Step 2: Convert to fraction form
   31,938.81/43,756.38 = 30,741.68/x
3. Step 3: Cross multiply
   31,938.81x = 43,756.38 × 30,741.68
4. Step 4: Simplify right side
   31,938.81x = 1,345,144,631.92
5. Step 5: Solve for x
   x = 1,345,144,631.92/31,938.81
6. Step 6: Final answer
   x = 42,116.30