Finding the Fourth Proportional to 4,773.30, 7,150.14 and 2,820.78

Step by Step Solution

1. Step 1: Write the proportion equation
   4,773.30 : 7,150.14 = 2,820.78 : x
2. Step 2: Convert to fraction form
   4,773.30/7,150.14 = 2,820.78/x
3. Step 3: Cross multiply
   4,773.30x = 7,150.14 × 2,820.78
4. Step 4: Simplify right side
   4,773.30x = 20,168,971.91
5. Step 5: Solve for x
   x = 20,168,971.91/4,773.30
6. Step 6: Final answer
   x = 4,225.37