Finding the Fourth Proportional to 22,958.93, 31,683.79 and 12,888.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,958.93 : 31,683.79 = 12,888.10 : x
2. Step 2: Convert to fraction form
   22,958.93/31,683.79 = 12,888.10/x
3. Step 3: Cross multiply
   22,958.93x = 31,683.79 × 12,888.10
4. Step 4: Simplify right side
   22,958.93x = 408,343,631.04
5. Step 5: Solve for x
   x = 408,343,631.04/22,958.93
6. Step 6: Final answer
   x = 17,785.83