Finding the Fourth Proportional to 9,301.96, 12,818.91 and 9,131.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,301.96 : 12,818.91 = 9,131.14 : x
2. Step 2: Convert to fraction form
   9,301.96/12,818.91 = 9,131.14/x
3. Step 3: Cross multiply
   9,301.96x = 12,818.91 × 9,131.14
4. Step 4: Simplify right side
   9,301.96x = 117,051,261.86
5. Step 5: Solve for x
   x = 117,051,261.86/9,301.96
6. Step 6: Final answer
   x = 12,583.51