Finding the Fourth Proportional to 19,100.79, 28,518.71 and 17,919.81

Step by Step Solution

1. Step 1: Write the proportion equation
   19,100.79 : 28,518.71 = 17,919.81 : x
2. Step 2: Convert to fraction form
   19,100.79/28,518.71 = 17,919.81/x
3. Step 3: Cross multiply
   19,100.79x = 28,518.71 × 17,919.81
4. Step 4: Simplify right side
   19,100.79x = 511,049,775.05
5. Step 5: Solve for x
   x = 511,049,775.05/19,100.79
6. Step 6: Final answer
   x = 26,755.43