Finding the Fourth Proportional to 12,807.60, 17,671.82 and 7,774.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.60 : 17,671.82 = 7,774.47 : x
2. Step 2: Convert to fraction form
   12,807.60/17,671.82 = 7,774.47/x
3. Step 3: Cross multiply
   12,807.60x = 17,671.82 × 7,774.47
4. Step 4: Simplify right side
   12,807.60x = 137,388,995.56
5. Step 5: Solve for x
   x = 137,388,995.56/12,807.60
6. Step 6: Final answer
   x = 10,727.15