Finding the Fourth Proportional to 9,931.12, 14,899.14 and 7,123.24

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.12 : 14,899.14 = 7,123.24 : x
2. Step 2: Convert to fraction form
   9,931.12/14,899.14 = 7,123.24/x
3. Step 3: Cross multiply
   9,931.12x = 14,899.14 × 7,123.24
4. Step 4: Simplify right side
   9,931.12x = 106,130,150.01
5. Step 5: Solve for x
   x = 106,130,150.01/9,931.12
6. Step 6: Final answer
   x = 10,686.62