Finding the Fourth Proportional to 10,978.61, 16,440.17 and 7,269.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.61 : 16,440.17 = 7,269.62 : x
2. Step 2: Convert to fraction form
   10,978.61/16,440.17 = 7,269.62/x
3. Step 3: Cross multiply
   10,978.61x = 16,440.17 × 7,269.62
4. Step 4: Simplify right side
   10,978.61x = 119,513,670.09
5. Step 5: Solve for x
   x = 119,513,670.09/10,978.61
6. Step 6: Final answer
   x = 10,886.05