Finding the Fourth Proportional to 12,910.88, 17,817.01 and 7,321.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,910.88 : 17,817.01 = 7,321.88 : x
2. Step 2: Convert to fraction form
   12,910.88/17,817.01 = 7,321.88/x
3. Step 3: Cross multiply
   12,910.88x = 17,817.01 × 7,321.88
4. Step 4: Simplify right side
   12,910.88x = 130,454,009.18
5. Step 5: Solve for x
   x = 130,454,009.18/12,910.88
6. Step 6: Final answer
   x = 10,104.19