Finding the Fourth Proportional to 23,686.56, 32,686.94 and 12,931.07

Step by Step Solution

1. Step 1: Write the proportion equation
   23,686.56 : 32,686.94 = 12,931.07 : x
2. Step 2: Convert to fraction form
   23,686.56/32,686.94 = 12,931.07/x
3. Step 3: Cross multiply
   23,686.56x = 32,686.94 × 12,931.07
4. Step 4: Simplify right side
   23,686.56x = 422,676,995.18
5. Step 5: Solve for x
   x = 422,676,995.18/23,686.56
6. Step 6: Final answer
   x = 17,844.59