Finding the Fourth Proportional to 21,155.10, 31,736.25 and 7,300.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,155.10 : 31,736.25 = 7,300.86 : x
2. Step 2: Convert to fraction form
   21,155.10/31,736.25 = 7,300.86/x
3. Step 3: Cross multiply
   21,155.10x = 31,736.25 × 7,300.86
4. Step 4: Simplify right side
   21,155.10x = 231,701,918.18
5. Step 5: Solve for x
   x = 231,701,918.18/21,155.10
6. Step 6: Final answer
   x = 10,952.53