Finding the Fourth Proportional to 9,390.06, 12,957.90 and 5,615.33

Step by Step Solution

1. Step 1: Write the proportion equation
   9,390.06 : 12,957.90 = 5,615.33 : x
2. Step 2: Convert to fraction form
   9,390.06/12,957.90 = 5,615.33/x
3. Step 3: Cross multiply
   9,390.06x = 12,957.90 × 5,615.33
4. Step 4: Simplify right side
   9,390.06x = 72,762,819.82
5. Step 5: Solve for x
   x = 72,762,819.82/9,390.06
6. Step 6: Final answer
   x = 7,748.92