Finding the Fourth Proportional to 11,580.72, 15,981.70 and 7,101.88

Step by Step Solution

1. Step 1: Write the proportion equation
   11,580.72 : 15,981.70 = 7,101.88 : x
2. Step 2: Convert to fraction form
   11,580.72/15,981.70 = 7,101.88/x
3. Step 3: Cross multiply
   11,580.72x = 15,981.70 × 7,101.88
4. Step 4: Simplify right side
   11,580.72x = 113,500,115.60
5. Step 5: Solve for x
   x = 113,500,115.60/11,580.72
6. Step 6: Final answer
   x = 9,800.78