Finding the Fourth Proportional to 10,779, 14,870.12 and 7,790.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,779 : 14,870.12 = 7,790.10 : x
2. Step 2: Convert to fraction form
   10,779/14,870.12 = 7,790.10/x
3. Step 3: Cross multiply
   10,779x = 14,870.12 × 7,790.10
4. Step 4: Simplify right side
   10,779x = 115,839,721.81
5. Step 5: Solve for x
   x = 115,839,721.81/10,779
6. Step 6: Final answer
   x = 10,746.80