Finding the Fourth Proportional to 22,590, 31,171.97 and 13,030.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,590 : 31,171.97 = 13,030.76 : x
2. Step 2: Convert to fraction form
   22,590/31,171.97 = 13,030.76/x
3. Step 3: Cross multiply
   22,590x = 31,171.97 × 13,030.76
4. Step 4: Simplify right side
   22,590x = 406,194,238.78
5. Step 5: Solve for x
   x = 406,194,238.78/22,590
6. Step 6: Final answer
   x = 17,981.15