Finding the Fourth Proportional to 10,619.78, 14,659.36 and 7,081.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,619.78 : 14,659.36 = 7,081.70 : x
2. Step 2: Convert to fraction form
   10,619.78/14,659.36 = 7,081.70/x
3. Step 3: Cross multiply
   10,619.78x = 14,659.36 × 7,081.70
4. Step 4: Simplify right side
   10,619.78x = 103,813,189.71
5. Step 5: Solve for x
   x = 103,813,189.71/10,619.78
6. Step 6: Final answer
   x = 9,775.46