Finding the Fourth Proportional to 31,151.40, 42,969.78 and 22,201.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,151.40 : 42,969.78 = 22,201.80 : x
2. Step 2: Convert to fraction form
   31,151.40/42,969.78 = 22,201.80/x
3. Step 3: Cross multiply
   31,151.40x = 42,969.78 × 22,201.80
4. Step 4: Simplify right side
   31,151.40x = 954,006,461.60
5. Step 5: Solve for x
   x = 954,006,461.60/31,151.40
6. Step 6: Final answer
   x = 30,624.83