Finding the Fourth Proportional to 22,490.51, 31,037.90 and 12,933.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,490.51 : 31,037.90 = 12,933.50 : x
2. Step 2: Convert to fraction form
   22,490.51/31,037.90 = 12,933.50/x
3. Step 3: Cross multiply
   22,490.51x = 31,037.90 × 12,933.50
4. Step 4: Simplify right side
   22,490.51x = 401,428,459.79
5. Step 5: Solve for x
   x = 401,428,459.79/22,490.51
6. Step 6: Final answer
   x = 17,848.80