Finding the Fourth Proportional to 81,903.30, 122,830.17 and 31,969.86

Step by Step Solution

1. Step 1: Write the proportion equation
   81,903.30 : 122,830.17 = 31,969.86 : x
2. Step 2: Convert to fraction form
   81,903.30/122,830.17 = 31,969.86/x
3. Step 3: Cross multiply
   81,903.30x = 122,830.17 × 31,969.86
4. Step 4: Simplify right side
   81,903.30x = 3,926,863,338.68
5. Step 5: Solve for x
   x = 3,926,863,338.68/81,903.30
6. Step 6: Final answer
   x = 47,945.12