Finding the Fourth Proportional to 11,585.12, 15,969.76 and 7,100.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,585.12 : 15,969.76 = 7,100.55 : x
2. Step 2: Convert to fraction form
   11,585.12/15,969.76 = 7,100.55/x
3. Step 3: Cross multiply
   11,585.12x = 15,969.76 × 7,100.55
4. Step 4: Simplify right side
   11,585.12x = 113,394,061.62
5. Step 5: Solve for x
   x = 113,394,061.62/11,585.12
6. Step 6: Final answer
   x = 9,787.91