Finding the Fourth Proportional to 7,355.30, 10,152.09 and 4,213.31

Step by Step Solution

1. Step 1: Write the proportion equation
   7,355.30 : 10,152.09 = 4,213.31 : x
2. Step 2: Convert to fraction form
   7,355.30/10,152.09 = 4,213.31/x
3. Step 3: Cross multiply
   7,355.30x = 10,152.09 × 4,213.31
4. Step 4: Simplify right side
   7,355.30x = 42,773,851.56
5. Step 5: Solve for x
   x = 42,773,851.56/7,355.30
6. Step 6: Final answer
   x = 5,815.38