Finding the Fourth Proportional to 8,931.90, 12,323.52 and 7,037.60

Step by Step Solution

1. Step 1: Write the proportion equation
   8,931.90 : 12,323.52 = 7,037.60 : x
2. Step 2: Convert to fraction form
   8,931.90/12,323.52 = 7,037.60/x
3. Step 3: Cross multiply
   8,931.90x = 12,323.52 × 7,037.60
4. Step 4: Simplify right side
   8,931.90x = 86,728,004.35
5. Step 5: Solve for x
   x = 86,728,004.35/8,931.90
6. Step 6: Final answer
   x = 9,709.92