Finding the Fourth Proportional to 19,300.50, 26,638.38 and 10,917

Step by Step Solution

1. Step 1: Write the proportion equation
   19,300.50 : 26,638.38 = 10,917 : x
2. Step 2: Convert to fraction form
   19,300.50/26,638.38 = 10,917/x
3. Step 3: Cross multiply
   19,300.50x = 26,638.38 × 10,917
4. Step 4: Simplify right side
   19,300.50x = 290,811,194.46
5. Step 5: Solve for x
   x = 290,811,194.46/19,300.50
6. Step 6: Final answer
   x = 15,067.55