Finding the Fourth Proportional to 9,379.90, 12,943.84 and 5,400.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,379.90 : 12,943.84 = 5,400.17 : x
2. Step 2: Convert to fraction form
   9,379.90/12,943.84 = 5,400.17/x
3. Step 3: Cross multiply
   9,379.90x = 12,943.84 × 5,400.17
4. Step 4: Simplify right side
   9,379.90x = 69,898,936.45
5. Step 5: Solve for x
   x = 69,898,936.45/9,379.90
6. Step 6: Final answer
   x = 7,451.99