Finding the Fourth Proportional to 31,009.01, 42,795.61 and 18,266.21

Step by Step Solution

1. Step 1: Write the proportion equation
   31,009.01 : 42,795.61 = 18,266.21 : x
2. Step 2: Convert to fraction form
   31,009.01/42,795.61 = 18,266.21/x
3. Step 3: Cross multiply
   31,009.01x = 42,795.61 × 18,266.21
4. Step 4: Simplify right side
   31,009.01x = 781,713,500.18
5. Step 5: Solve for x
   x = 781,713,500.18/31,009.01
6. Step 6: Final answer
   x = 25,209.24