Finding the Fourth Proportional to 4,770.17, 7,158.59 and 3,213.15

Step by Step Solution

1. Step 1: Write the proportion equation
   4,770.17 : 7,158.59 = 3,213.15 : x
2. Step 2: Convert to fraction form
   4,770.17/7,158.59 = 3,213.15/x
3. Step 3: Cross multiply
   4,770.17x = 7,158.59 × 3,213.15
4. Step 4: Simplify right side
   4,770.17x = 23,001,623.46
5. Step 5: Solve for x
   x = 23,001,623.46/4,770.17
6. Step 6: Final answer
   x = 4,821.97