Finding the Fourth Proportional to 12,780.17, 19,159.78 and 5,758.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,780.17 : 19,159.78 = 5,758.08 : x
2. Step 2: Convert to fraction form
   12,780.17/19,159.78 = 5,758.08/x
3. Step 3: Cross multiply
   12,780.17x = 19,159.78 × 5,758.08
4. Step 4: Simplify right side
   12,780.17x = 110,323,546.02
5. Step 5: Solve for x
   x = 110,323,546.02/12,780.17
6. Step 6: Final answer
   x = 8,632.40