Finding the Fourth Proportional to 31,128.03, 42,955.38 and 17,697.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.03 : 42,955.38 = 17,697.42 : x
2. Step 2: Convert to fraction form
   31,128.03/42,955.38 = 17,697.42/x
3. Step 3: Cross multiply
   31,128.03x = 42,955.38 × 17,697.42
4. Step 4: Simplify right side
   31,128.03x = 760,199,401.12
5. Step 5: Solve for x
   x = 760,199,401.12/31,128.03
6. Step 6: Final answer
   x = 24,421.70