Finding the Fourth Proportional to 12,987.01, 19,477.95 and 5,965.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987.01 : 19,477.95 = 5,965.12 : x
2. Step 2: Convert to fraction form
   12,987.01/19,477.95 = 5,965.12/x
3. Step 3: Cross multiply
   12,987.01x = 19,477.95 × 5,965.12
4. Step 4: Simplify right side
   12,987.01x = 116,188,309.10
5. Step 5: Solve for x
   x = 116,188,309.10/12,987.01
6. Step 6: Final answer
   x = 8,946.50