Finding the Fourth Proportional to 11,978.55, 16,530.57 and 6,943.14

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.55 : 16,530.57 = 6,943.14 : x
2. Step 2: Convert to fraction form
   11,978.55/16,530.57 = 6,943.14/x
3. Step 3: Cross multiply
   11,978.55x = 16,530.57 × 6,943.14
4. Step 4: Simplify right side
   11,978.55x = 114,774,061.79
5. Step 5: Solve for x
   x = 114,774,061.79/11,978.55
6. Step 6: Final answer
   x = 9,581.63