Finding the Fourth Proportional to 17,859.47, 26,780.55 and 5,377.17

Step by Step Solution

1. Step 1: Write the proportion equation
   17,859.47 : 26,780.55 = 5,377.17 : x
2. Step 2: Convert to fraction form
   17,859.47/26,780.55 = 5,377.17/x
3. Step 3: Cross multiply
   17,859.47x = 26,780.55 × 5,377.17
4. Step 4: Simplify right side
   17,859.47x = 144,003,570.04
5. Step 5: Solve for x
   x = 144,003,570.04/17,859.47
6. Step 6: Final answer
   x = 8,063.15