Finding the Fourth Proportional to 10,085.16, 15,116.54 and 7,611.96

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.16 : 15,116.54 = 7,611.96 : x
2. Step 2: Convert to fraction form
   10,085.16/15,116.54 = 7,611.96/x
3. Step 3: Cross multiply
   10,085.16x = 15,116.54 × 7,611.96
4. Step 4: Simplify right side
   10,085.16x = 115,066,459.76
5. Step 5: Solve for x
   x = 115,066,459.76/10,085.16
6. Step 6: Final answer
   x = 11,409.48