Finding the Fourth Proportional to 12,686.06, 17,495.07 and 8,700.14

Step by Step Solution

1. Step 1: Write the proportion equation
   12,686.06 : 17,495.07 = 8,700.14 : x
2. Step 2: Convert to fraction form
   12,686.06/17,495.07 = 8,700.14/x
3. Step 3: Cross multiply
   12,686.06x = 17,495.07 × 8,700.14
4. Step 4: Simplify right side
   12,686.06x = 152,209,558.31
5. Step 5: Solve for x
   x = 152,209,558.31/12,686.06
6. Step 6: Final answer
   x = 11,998.17