Finding the Fourth Proportional to 31,885.79, 43,817.69 and 30,422.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,885.79 : 43,817.69 = 30,422.31 : x
2. Step 2: Convert to fraction form
   31,885.79/43,817.69 = 30,422.31/x
3. Step 3: Cross multiply
   31,885.79x = 43,817.69 × 30,422.31
4. Step 4: Simplify right side
   31,885.79x = 1,333,035,196.55
5. Step 5: Solve for x
   x = 1,333,035,196.55/31,885.79
6. Step 6: Final answer
   x = 41,806.57