Finding the Fourth Proportional to 9,362.09, 12,921.90 and 5,385.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,362.09 : 12,921.90 = 5,385.50 : x
2. Step 2: Convert to fraction form
   9,362.09/12,921.90 = 5,385.50/x
3. Step 3: Cross multiply
   9,362.09x = 12,921.90 × 5,385.50
4. Step 4: Simplify right side
   9,362.09x = 69,590,892.45
5. Step 5: Solve for x
   x = 69,590,892.45/9,362.09
6. Step 6: Final answer
   x = 7,433.26