Finding the Fourth Proportional to 23,050.48, 31,810.68 and 12,978.92

Step by Step Solution

1. Step 1: Write the proportion equation
   23,050.48 : 31,810.68 = 12,978.92 : x
2. Step 2: Convert to fraction form
   23,050.48/31,810.68 = 12,978.92/x
3. Step 3: Cross multiply
   23,050.48x = 31,810.68 × 12,978.92
4. Step 4: Simplify right side
   23,050.48x = 412,868,270.87
5. Step 5: Solve for x
   x = 412,868,270.87/23,050.48
6. Step 6: Final answer
   x = 17,911.48