Finding the Fourth Proportional to 9,340.96, 12,890.76 and 5,362.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,340.96 : 12,890.76 = 5,362.78 : x
2. Step 2: Convert to fraction form
   9,340.96/12,890.76 = 5,362.78/x
3. Step 3: Cross multiply
   9,340.96x = 12,890.76 × 5,362.78
4. Step 4: Simplify right side
   9,340.96x = 69,130,309.91
5. Step 5: Solve for x
   x = 69,130,309.91/9,340.96
6. Step 6: Final answer
   x = 7,400.77