Finding the Fourth Proportional to 22,499.82, 31,043.52 and 12,939.19

Step by Step Solution

1. Step 1: Write the proportion equation
   22,499.82 : 31,043.52 = 12,939.19 : x
2. Step 2: Convert to fraction form
   22,499.82/31,043.52 = 12,939.19/x
3. Step 3: Cross multiply
   22,499.82x = 31,043.52 × 12,939.19
4. Step 4: Simplify right side
   22,499.82x = 401,677,925.94
5. Step 5: Solve for x
   x = 401,677,925.94/22,499.82
6. Step 6: Final answer
   x = 17,852.50