Finding the Fourth Proportional to 31,994.83, 47,971.69 and 13,287.77

Step by Step Solution

1. Step 1: Write the proportion equation
   31,994.83 : 47,971.69 = 13,287.77 : x
2. Step 2: Convert to fraction form
   31,994.83/47,971.69 = 13,287.77/x
3. Step 3: Cross multiply
   31,994.83x = 47,971.69 × 13,287.77
4. Step 4: Simplify right side
   31,994.83x = 637,436,510.15
5. Step 5: Solve for x
   x = 637,436,510.15/31,994.83
6. Step 6: Final answer
   x = 19,923.11