Finding the Fourth Proportional to 9,187.42, 12,684.72 and 7,059.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,187.42 : 12,684.72 = 7,059.15 : x
2. Step 2: Convert to fraction form
   9,187.42/12,684.72 = 7,059.15/x
3. Step 3: Cross multiply
   9,187.42x = 12,684.72 × 7,059.15
4. Step 4: Simplify right side
   9,187.42x = 89,543,341.19
5. Step 5: Solve for x
   x = 89,543,341.19/9,187.42
6. Step 6: Final answer
   x = 9,746.30