Finding the Fourth Proportional to 11,980.94, 17,970.01 and 3,215.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,980.94 : 17,970.01 = 3,215.16 : x
2. Step 2: Convert to fraction form
   11,980.94/17,970.01 = 3,215.16/x
3. Step 3: Cross multiply
   11,980.94x = 17,970.01 × 3,215.16
4. Step 4: Simplify right side
   11,980.94x = 57,776,449.31
5. Step 5: Solve for x
   x = 57,776,449.31/11,980.94
6. Step 6: Final answer
   x = 4,822.37