Finding the Fourth Proportional to 12,994, 17,931.72 and 7,106

Step by Step Solution

1. Step 1: Write the proportion equation
   12,994 : 17,931.72 = 7,106 : x
2. Step 2: Convert to fraction form
   12,994/17,931.72 = 7,106/x
3. Step 3: Cross multiply
   12,994x = 17,931.72 × 7,106
4. Step 4: Simplify right side
   12,994x = 127,422,802.32
5. Step 5: Solve for x
   x = 127,422,802.32/12,994
6. Step 6: Final answer
   x = 9,806.28