Finding the Fourth Proportional to 23,118.47, 31,903.43 and 12,508.28

Step by Step Solution

1. Step 1: Write the proportion equation
   23,118.47 : 31,903.43 = 12,508.28 : x
2. Step 2: Convert to fraction form
   23,118.47/31,903.43 = 12,508.28/x
3. Step 3: Cross multiply
   23,118.47x = 31,903.43 × 12,508.28
4. Step 4: Simplify right side
   23,118.47x = 399,056,813.34
5. Step 5: Solve for x
   x = 399,056,813.34/23,118.47
6. Step 6: Final answer
   x = 17,261.39