Finding the Fourth Proportional to 31,504.61, 47,276.69 and 12,784.73

Step by Step Solution

1. Step 1: Write the proportion equation
   31,504.61 : 47,276.69 = 12,784.73 : x
2. Step 2: Convert to fraction form
   31,504.61/47,276.69 = 12,784.73/x
3. Step 3: Cross multiply
   31,504.61x = 47,276.69 × 12,784.73
4. Step 4: Simplify right side
   31,504.61x = 604,419,716.94
5. Step 5: Solve for x
   x = 604,419,716.94/31,504.61
6. Step 6: Final answer
   x = 19,185.12