Finding the Fourth Proportional to 9,918.02, 14,863.12 and 7,131.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.02 : 14,863.12 = 7,131.58 : x
2. Step 2: Convert to fraction form
   9,918.02/14,863.12 = 7,131.58/x
3. Step 3: Cross multiply
   9,918.02x = 14,863.12 × 7,131.58
4. Step 4: Simplify right side
   9,918.02x = 105,997,474.34
5. Step 5: Solve for x
   x = 105,997,474.34/9,918.02
6. Step 6: Final answer
   x = 10,687.36