Finding the Fourth Proportional to 11,380.99, 17,060.67 and 3,980.62

Step by Step Solution

1. Step 1: Write the proportion equation
   11,380.99 : 17,060.67 = 3,980.62 : x
2. Step 2: Convert to fraction form
   11,380.99/17,060.67 = 3,980.62/x
3. Step 3: Cross multiply
   11,380.99x = 17,060.67 × 3,980.62
4. Step 4: Simplify right side
   11,380.99x = 67,912,044.22
5. Step 5: Solve for x
   x = 67,912,044.22/11,380.99
6. Step 6: Final answer
   x = 5,967.15