Finding the Fourth Proportional to 19,657.89, 27,128.55 and 10,705.54

Step by Step Solution

1. Step 1: Write the proportion equation
   19,657.89 : 27,128.55 = 10,705.54 : x
2. Step 2: Convert to fraction form
   19,657.89/27,128.55 = 10,705.54/x
3. Step 3: Cross multiply
   19,657.89x = 27,128.55 × 10,705.54
4. Step 4: Simplify right side
   19,657.89x = 290,425,777.17
5. Step 5: Solve for x
   x = 290,425,777.17/19,657.89
6. Step 6: Final answer
   x = 14,774.01