Finding the Fourth Proportional to 23,100.66, 31,878.98 and 12,490.36

Step by Step Solution

1. Step 1: Write the proportion equation
   23,100.66 : 31,878.98 = 12,490.36 : x
2. Step 2: Convert to fraction form
   23,100.66/31,878.98 = 12,490.36/x
3. Step 3: Cross multiply
   23,100.66x = 31,878.98 × 12,490.36
4. Step 4: Simplify right side
   23,100.66x = 398,179,936.63
5. Step 5: Solve for x
   x = 398,179,936.63/23,100.66
6. Step 6: Final answer
   x = 17,236.73