Finding the Fourth Proportional to 17,665.54, 26,488.99 and 7,800.15

Step by Step Solution

1. Step 1: Write the proportion equation
   17,665.54 : 26,488.99 = 7,800.15 : x
2. Step 2: Convert to fraction form
   17,665.54/26,488.99 = 7,800.15/x
3. Step 3: Cross multiply
   17,665.54x = 26,488.99 × 7,800.15
4. Step 4: Simplify right side
   17,665.54x = 206,618,095.35
5. Step 5: Solve for x
   x = 206,618,095.35/17,665.54
6. Step 6: Final answer
   x = 11,696.11