Finding the Fourth Proportional to 91,981.23, 137,919.78 and 31,982.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,981.23 : 137,919.78 = 31,982.10 : x
2. Step 2: Convert to fraction form
   91,981.23/137,919.78 = 31,982.10/x
3. Step 3: Cross multiply
   91,981.23x = 137,919.78 × 31,982.10
4. Step 4: Simplify right side
   91,981.23x = 4,410,964,195.94
5. Step 5: Solve for x
   x = 4,410,964,195.94/91,981.23
6. Step 6: Final answer
   x = 47,955.05