Finding the Fourth Proportional to 9,991.31, 13,846.30 and 9,850.37

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.31 : 13,846.30 = 9,850.37 : x
2. Step 2: Convert to fraction form
   9,991.31/13,846.30 = 9,850.37/x
3. Step 3: Cross multiply
   9,991.31x = 13,846.30 × 9,850.37
4. Step 4: Simplify right side
   9,991.31x = 136,391,084.27
5. Step 5: Solve for x
   x = 136,391,084.27/9,991.31
6. Step 6: Final answer
   x = 13,650.98