Finding the Fourth Proportional to 10,578.02, 14,612.56 and 9,790.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,578.02 : 14,612.56 = 9,790.70 : x
2. Step 2: Convert to fraction form
   10,578.02/14,612.56 = 9,790.70/x
3. Step 3: Cross multiply
   10,578.02x = 14,612.56 × 9,790.70
4. Step 4: Simplify right side
   10,578.02x = 143,067,191.19
5. Step 5: Solve for x
   x = 143,067,191.19/10,578.02
6. Step 6: Final answer
   x = 13,524.95