Finding the Fourth Proportional to 21,090.12, 31,624.85 and 7,045.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,090.12 : 31,624.85 = 7,045.33 : x
2. Step 2: Convert to fraction form
   21,090.12/31,624.85 = 7,045.33/x
3. Step 3: Cross multiply
   21,090.12x = 31,624.85 × 7,045.33
4. Step 4: Simplify right side
   21,090.12x = 222,807,443.00
5. Step 5: Solve for x
   x = 222,807,443.00/21,090.12
6. Step 6: Final answer
   x = 10,564.54