Finding the Fourth Proportional to 9,783.18, 13,510.80 and 9,156.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,783.18 : 13,510.80 = 9,156.24 : x
2. Step 2: Convert to fraction form
   9,783.18/13,510.80 = 9,156.24/x
3. Step 3: Cross multiply
   9,783.18x = 13,510.80 × 9,156.24
4. Step 4: Simplify right side
   9,783.18x = 123,708,127.39
5. Step 5: Solve for x
   x = 123,708,127.39/9,783.18
6. Step 6: Final answer
   x = 12,644.98