Finding the Fourth Proportional to 8,505.30, 12,782.52 and 7,914.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,505.30 : 12,782.52 = 7,914.72 : x
2. Step 2: Convert to fraction form
   8,505.30/12,782.52 = 7,914.72/x
3. Step 3: Cross multiply
   8,505.30x = 12,782.52 × 7,914.72
4. Step 4: Simplify right side
   8,505.30x = 101,170,066.69
5. Step 5: Solve for x
   x = 101,170,066.69/8,505.30
6. Step 6: Final answer
   x = 11,894.94