Finding the Fourth Proportional to 11,118.96, 15,346.32 and 7,145.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,118.96 : 15,346.32 = 7,145.10 : x
2. Step 2: Convert to fraction form
   11,118.96/15,346.32 = 7,145.10/x
3. Step 3: Cross multiply
   11,118.96x = 15,346.32 × 7,145.10
4. Step 4: Simplify right side
   11,118.96x = 109,650,991.03
5. Step 5: Solve for x
   x = 109,650,991.03/11,118.96
6. Step 6: Final answer
   x = 9,861.62