Finding the Fourth Proportional to 9,986.31, 14,985.54 and 9,903.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.31 : 14,985.54 = 9,903.69 : x
2. Step 2: Convert to fraction form
   9,986.31/14,985.54 = 9,903.69/x
3. Step 3: Cross multiply
   9,986.31x = 14,985.54 × 9,903.69
4. Step 4: Simplify right side
   9,986.31x = 148,412,142.64
5. Step 5: Solve for x
   x = 148,412,142.64/9,986.31
6. Step 6: Final answer
   x = 14,861.56