Finding the Fourth Proportional to 21,050.96, 31,555.32 and 7,190.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,050.96 : 31,555.32 = 7,190.48 : x
2. Step 2: Convert to fraction form
   21,050.96/31,555.32 = 7,190.48/x
3. Step 3: Cross multiply
   21,050.96x = 31,555.32 × 7,190.48
4. Step 4: Simplify right side
   21,050.96x = 226,897,897.35
5. Step 5: Solve for x
   x = 226,897,897.35/21,050.96
6. Step 6: Final answer
   x = 10,778.51