Finding the Fourth Proportional to 22,171.10, 31,117.30 and 22,171.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,171.10 : 31,117.30 = 22,171.10 : x
2. Step 2: Convert to fraction form
   22,171.10/31,117.30 = 22,171.10/x
3. Step 3: Cross multiply
   22,171.10x = 31,117.30 × 22,171.10
4. Step 4: Simplify right side
   22,171.10x = 689,904,770.03
5. Step 5: Solve for x
   x = 689,904,770.03/22,171.10
6. Step 6: Final answer
   x = 31,117.30