Finding the Fourth Proportional to 31,796.16, 47,690.64 and 8,103.60

Step by Step Solution

1. Step 1: Write the proportion equation
   31,796.16 : 47,690.64 = 8,103.60 : x
2. Step 2: Convert to fraction form
   31,796.16/47,690.64 = 8,103.60/x
3. Step 3: Cross multiply
   31,796.16x = 47,690.64 × 8,103.60
4. Step 4: Simplify right side
   31,796.16x = 386,465,870.30
5. Step 5: Solve for x
   x = 386,465,870.30/31,796.16
6. Step 6: Final answer
   x = 12,154.48