Finding the Fourth Proportional to 9,090.72, 12,536.64 and 8,411.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,090.72 : 12,536.64 = 8,411.94 : x
2. Step 2: Convert to fraction form
   9,090.72/12,536.64 = 8,411.94/x
3. Step 3: Cross multiply
   9,090.72x = 12,536.64 × 8,411.94
4. Step 4: Simplify right side
   9,090.72x = 105,457,463.48
5. Step 5: Solve for x
   x = 105,457,463.48/9,090.72
6. Step 6: Final answer
   x = 11,600.56