Finding the Fourth Proportional to 9,111.34, 12,574.59 and 5,576.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.34 : 12,574.59 = 5,576.90 : x
2. Step 2: Convert to fraction form
   9,111.34/12,574.59 = 5,576.90/x
3. Step 3: Cross multiply
   9,111.34x = 12,574.59 × 5,576.90
4. Step 4: Simplify right side
   9,111.34x = 70,127,230.97
5. Step 5: Solve for x
   x = 70,127,230.97/9,111.34
6. Step 6: Final answer
   x = 7,696.70