Finding the Fourth Proportional to 31,776.42, 47,655.48 and 12,801

Step by Step Solution

1. Step 1: Write the proportion equation
   31,776.42 : 47,655.48 = 12,801 : x
2. Step 2: Convert to fraction form
   31,776.42/47,655.48 = 12,801/x
3. Step 3: Cross multiply
   31,776.42x = 47,655.48 × 12,801
4. Step 4: Simplify right side
   31,776.42x = 610,037,799.48
5. Step 5: Solve for x
   x = 610,037,799.48/31,776.42
6. Step 6: Final answer
   x = 19,197.81