Finding the Fourth Proportional to 9,118.56, 12,583.80 and 5,139.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,118.56 : 12,583.80 = 5,139.84 : x
2. Step 2: Convert to fraction form
   9,118.56/12,583.80 = 5,139.84/x
3. Step 3: Cross multiply
   9,118.56x = 12,583.80 × 5,139.84
4. Step 4: Simplify right side
   9,118.56x = 64,678,718.59
5. Step 5: Solve for x
   x = 64,678,718.59/9,118.56
6. Step 6: Final answer
   x = 7,093.08