Finding the Fourth Proportional to 11,615.42, 16,013.40 and 7,981.34

Step by Step Solution

1. Step 1: Write the proportion equation
   11,615.42 : 16,013.40 = 7,981.34 : x
2. Step 2: Convert to fraction form
   11,615.42/16,013.40 = 7,981.34/x
3. Step 3: Cross multiply
   11,615.42x = 16,013.40 × 7,981.34
4. Step 4: Simplify right side
   11,615.42x = 127,808,389.96
5. Step 5: Solve for x
   x = 127,808,389.96/11,615.42
6. Step 6: Final answer
   x = 11,003.34