Finding the Fourth Proportional to 12,990.56, 17,927.04 and 7,401.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,990.56 : 17,927.04 = 7,401.56 : x
2. Step 2: Convert to fraction form
   12,990.56/17,927.04 = 7,401.56/x
3. Step 3: Cross multiply
   12,990.56x = 17,927.04 × 7,401.56
4. Step 4: Simplify right side
   12,990.56x = 132,688,062.18
5. Step 5: Solve for x
   x = 132,688,062.18/12,990.56
6. Step 6: Final answer
   x = 10,214.19