Finding the Fourth Proportional to 11,374.49, 17,061.21 and 3,980.61

Step by Step Solution

1. Step 1: Write the proportion equation
   11,374.49 : 17,061.21 = 3,980.61 : x
2. Step 2: Convert to fraction form
   11,374.49/17,061.21 = 3,980.61/x
3. Step 3: Cross multiply
   11,374.49x = 17,061.21 × 3,980.61
4. Step 4: Simplify right side
   11,374.49x = 67,914,023.14
5. Step 5: Solve for x
   x = 67,914,023.14/11,374.49
6. Step 6: Final answer
   x = 5,970.73