Finding the Fourth Proportional to 10,917.18, 15,070.86 and 7,386.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,917.18 : 15,070.86 = 7,386.12 : x
2. Step 2: Convert to fraction form
   10,917.18/15,070.86 = 7,386.12/x
3. Step 3: Cross multiply
   10,917.18x = 15,070.86 × 7,386.12
4. Step 4: Simplify right side
   10,917.18x = 111,315,180.46
5. Step 5: Solve for x
   x = 111,315,180.46/10,917.18
6. Step 6: Final answer
   x = 10,196.33