Finding the Fourth Proportional to 22,770.06, 31,412.79 and 13,815.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,770.06 : 31,412.79 = 13,815.78 : x
2. Step 2: Convert to fraction form
   22,770.06/31,412.79 = 13,815.78/x
3. Step 3: Cross multiply
   22,770.06x = 31,412.79 × 13,815.78
4. Step 4: Simplify right side
   22,770.06x = 433,992,195.83
5. Step 5: Solve for x
   x = 433,992,195.83/22,770.06
6. Step 6: Final answer
   x = 19,059.77