Finding the Fourth Proportional to 9,407.13, 12,981.98 and 5,158.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,407.13 : 12,981.98 = 5,158.58 : x
2. Step 2: Convert to fraction form
   9,407.13/12,981.98 = 5,158.58/x
3. Step 3: Cross multiply
   9,407.13x = 12,981.98 × 5,158.58
4. Step 4: Simplify right side
   9,407.13x = 66,968,582.39
5. Step 5: Solve for x
   x = 66,968,582.39/9,407.13
6. Step 6: Final answer
   x = 7,118.92