Finding the Fourth Proportional to 13,111.86, 18,085.08 and 12,677.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.86 : 18,085.08 = 12,677.94 : x
2. Step 2: Convert to fraction form
   13,111.86/18,085.08 = 12,677.94/x
3. Step 3: Cross multiply
   13,111.86x = 18,085.08 × 12,677.94
4. Step 4: Simplify right side
   13,111.86x = 229,281,559.14
5. Step 5: Solve for x
   x = 229,281,559.14/13,111.86
6. Step 6: Final answer
   x = 17,486.58