Finding the Fourth Proportional to 10,116.50, 15,177.31 and 2,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,116.50 : 15,177.31 = 2,820.50 : x
2. Step 2: Convert to fraction form
   10,116.50/15,177.31 = 2,820.50/x
3. Step 3: Cross multiply
   10,116.50x = 15,177.31 × 2,820.50
4. Step 4: Simplify right side
   10,116.50x = 42,807,602.86
5. Step 5: Solve for x
   x = 42,807,602.86/10,116.50
6. Step 6: Final answer
   x = 4,231.46