Finding the Fourth Proportional to 31,228.86, 43,116.63 and 18,486.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,228.86 : 43,116.63 = 18,486.18 : x
2. Step 2: Convert to fraction form
   31,228.86/43,116.63 = 18,486.18/x
3. Step 3: Cross multiply
   31,228.86x = 43,116.63 × 18,486.18
4. Step 4: Simplify right side
   31,228.86x = 797,061,783.17
5. Step 5: Solve for x
   x = 797,061,783.17/31,228.86
6. Step 6: Final answer
   x = 25,523.24