Finding the Fourth Proportional to 21,112.86, 31,671.12 and 5,530.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,112.86 : 31,671.12 = 5,530.50 : x
2. Step 2: Convert to fraction form
   21,112.86/31,671.12 = 5,530.50/x
3. Step 3: Cross multiply
   21,112.86x = 31,671.12 × 5,530.50
4. Step 4: Simplify right side
   21,112.86x = 175,157,129.16
5. Step 5: Solve for x
   x = 175,157,129.16/21,112.86
6. Step 6: Final answer
   x = 8,296.23