Finding the Fourth Proportional to 23,019.96, 31,766.20 and 12,810.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,019.96 : 31,766.20 = 12,810.72 : x
2. Step 2: Convert to fraction form
   23,019.96/31,766.20 = 12,810.72/x
3. Step 3: Cross multiply
   23,019.96x = 31,766.20 × 12,810.72
4. Step 4: Simplify right side
   23,019.96x = 406,947,893.66
5. Step 5: Solve for x
   x = 406,947,893.66/23,019.96
6. Step 6: Final answer
   x = 17,678.05