Finding the Fourth Proportional to 9,250.99, 13,906.56 and 7,422.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,250.99 : 13,906.56 = 7,422.12 : x
2. Step 2: Convert to fraction form
   9,250.99/13,906.56 = 7,422.12/x
3. Step 3: Cross multiply
   9,250.99x = 13,906.56 × 7,422.12
4. Step 4: Simplify right side
   9,250.99x = 103,216,157.11
5. Step 5: Solve for x
   x = 103,216,157.11/9,250.99
6. Step 6: Final answer
   x = 11,157.31