Finding the Fourth Proportional to 12,909.94, 17,815.71 and 7,320.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,909.94 : 17,815.71 = 7,320.94 : x
2. Step 2: Convert to fraction form
   12,909.94/17,815.71 = 7,320.94/x
3. Step 3: Cross multiply
   12,909.94x = 17,815.71 × 7,320.94
4. Step 4: Simplify right side
   12,909.94x = 130,427,726.88
5. Step 5: Solve for x
   x = 130,427,726.88/12,909.94
6. Step 6: Final answer
   x = 10,102.89