Finding the Fourth Proportional to 31,145.05, 42,983.33 and 18,402.36

Step by Step Solution

1. Step 1: Write the proportion equation
   31,145.05 : 42,983.33 = 18,402.36 : x
2. Step 2: Convert to fraction form
   31,145.05/42,983.33 = 18,402.36/x
3. Step 3: Cross multiply
   31,145.05x = 42,983.33 × 18,402.36
4. Step 4: Simplify right side
   31,145.05x = 790,994,459.46
5. Step 5: Solve for x
   x = 790,994,459.46/31,145.05
6. Step 6: Final answer
   x = 25,397.12