Finding the Fourth Proportional to 12,985.52, 17,916.02 and 7,944.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,985.52 : 17,916.02 = 7,944.49 : x
2. Step 2: Convert to fraction form
   12,985.52/17,916.02 = 7,944.49/x
3. Step 3: Cross multiply
   12,985.52x = 17,916.02 × 7,944.49
4. Step 4: Simplify right side
   12,985.52x = 142,333,598.10
5. Step 5: Solve for x
   x = 142,333,598.10/12,985.52
6. Step 6: Final answer
   x = 10,960.95