Finding the Fourth Proportional to 12,090.96, 16,685.76 and 7,896.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,090.96 : 16,685.76 = 7,896.72 : x
2. Step 2: Convert to fraction form
   12,090.96/16,685.76 = 7,896.72/x
3. Step 3: Cross multiply
   12,090.96x = 16,685.76 × 7,896.72
4. Step 4: Simplify right side
   12,090.96x = 131,762,774.71
5. Step 5: Solve for x
   x = 131,762,774.71/12,090.96
6. Step 6: Final answer
   x = 10,897.63