Finding the Fourth Proportional to 11,937.72, 17,868.42 and 7,981.32

Step by Step Solution

1. Step 1: Write the proportion equation
   11,937.72 : 17,868.42 = 7,981.32 : x
2. Step 2: Convert to fraction form
   11,937.72/17,868.42 = 7,981.32/x
3. Step 3: Cross multiply
   11,937.72x = 17,868.42 × 7,981.32
4. Step 4: Simplify right side
   11,937.72x = 142,613,577.91
5. Step 5: Solve for x
   x = 142,613,577.91/11,937.72
6. Step 6: Final answer
   x = 11,946.47