Finding the Fourth Proportional to 23,050.35, 31,806.86 and 12,978.54

Step by Step Solution

1. Step 1: Write the proportion equation
   23,050.35 : 31,806.86 = 12,978.54 : x
2. Step 2: Convert to fraction form
   23,050.35/31,806.86 = 12,978.54/x
3. Step 3: Cross multiply
   23,050.35x = 31,806.86 × 12,978.54
4. Step 4: Simplify right side
   23,050.35x = 412,806,539.89
5. Step 5: Solve for x
   x = 412,806,539.89/23,050.35
6. Step 6: Final answer
   x = 17,908.91