Finding the Fourth Proportional to 31,362.05, 43,283.23 and 21,799.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,362.05 : 43,283.23 = 21,799.40 : x
2. Step 2: Convert to fraction form
   31,362.05/43,283.23 = 21,799.40/x
3. Step 3: Cross multiply
   31,362.05x = 43,283.23 × 21,799.40
4. Step 4: Simplify right side
   31,362.05x = 943,548,173.15
5. Step 5: Solve for x
   x = 943,548,173.15/31,362.05
6. Step 6: Final answer
   x = 30,085.66