Finding the Fourth Proportional to 12,994.60, 17,932.74 and 7,405.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,994.60 : 17,932.74 = 7,405.48 : x
2. Step 2: Convert to fraction form
   12,994.60/17,932.74 = 7,405.48/x
3. Step 3: Cross multiply
   12,994.60x = 17,932.74 × 7,405.48
4. Step 4: Simplify right side
   12,994.60x = 132,800,547.42
5. Step 5: Solve for x
   x = 132,800,547.42/12,994.60
6. Step 6: Final answer
   x = 10,219.67