Finding the Fourth Proportional to 31,009.49, 42,796.28 and 18,266.69

Step by Step Solution

1. Step 1: Write the proportion equation
   31,009.49 : 42,796.28 = 18,266.69 : x
2. Step 2: Convert to fraction form
   31,009.49/42,796.28 = 18,266.69/x
3. Step 3: Cross multiply
   31,009.49x = 42,796.28 × 18,266.69
4. Step 4: Simplify right side
   31,009.49x = 781,746,240.47
5. Step 5: Solve for x
   x = 781,746,240.47/31,009.49
6. Step 6: Final answer
   x = 25,209.90