Finding the Fourth Proportional to 11,978.96, 17,970.47 and 6,711.71

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978.96 : 17,970.47 = 6,711.71 : x
2. Step 2: Convert to fraction form
   11,978.96/17,970.47 = 6,711.71/x
3. Step 3: Cross multiply
   11,978.96x = 17,970.47 × 6,711.71
4. Step 4: Simplify right side
   11,978.96x = 120,612,459.79
5. Step 5: Solve for x
   x = 120,612,459.79/11,978.96
6. Step 6: Final answer
   x = 10,068.70