Finding the Fourth Proportional to 12,906, 17,810.28 and 7,317

Step by Step Solution

1. Step 1: Write the proportion equation
   12,906 : 17,810.28 = 7,317 : x
2. Step 2: Convert to fraction form
   12,906/17,810.28 = 7,317/x
3. Step 3: Cross multiply
   12,906x = 17,810.28 × 7,317
4. Step 4: Simplify right side
   12,906x = 130,317,818.76
5. Step 5: Solve for x
   x = 130,317,818.76/12,906
6. Step 6: Final answer
   x = 10,097.46