Finding the Fourth Proportional to 23,100.60, 31,878.72 and 12,490.14

Step by Step Solution

1. Step 1: Write the proportion equation
   23,100.60 : 31,878.72 = 12,490.14 : x
2. Step 2: Convert to fraction form
   23,100.60/31,878.72 = 12,490.14/x
3. Step 3: Cross multiply
   23,100.60x = 31,878.72 × 12,490.14
4. Step 4: Simplify right side
   23,100.60x = 398,169,675.82
5. Step 5: Solve for x
   x = 398,169,675.82/23,100.60
6. Step 6: Final answer
   x = 17,236.33