Finding the Fourth Proportional to 7,359.50, 10,156.20 and 4,215.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,359.50 : 10,156.20 = 4,215.80 : x
2. Step 2: Convert to fraction form
   7,359.50/10,156.20 = 4,215.80/x
3. Step 3: Cross multiply
   7,359.50x = 10,156.20 × 4,215.80
4. Step 4: Simplify right side
   7,359.50x = 42,816,507.96
5. Step 5: Solve for x
   x = 42,816,507.96/7,359.50
6. Step 6: Final answer
   x = 5,817.86