Finding the Fourth Proportional to 13,003.16, 17,938.01 and 7,965.77

Step by Step Solution

1. Step 1: Write the proportion equation
   13,003.16 : 17,938.01 = 7,965.77 : x
2. Step 2: Convert to fraction form
   13,003.16/17,938.01 = 7,965.77/x
3. Step 3: Cross multiply
   13,003.16x = 17,938.01 × 7,965.77
4. Step 4: Simplify right side
   13,003.16x = 142,889,932.40
5. Step 5: Solve for x
   x = 142,889,932.40/13,003.16
6. Step 6: Final answer
   x = 10,988.87