Finding the Fourth Proportional to 31,820.94, 47,747.81 and 13,114.80

Step by Step Solution

1. Step 1: Write the proportion equation
   31,820.94 : 47,747.81 = 13,114.80 : x
2. Step 2: Convert to fraction form
   31,820.94/47,747.81 = 13,114.80/x
3. Step 3: Cross multiply
   31,820.94x = 47,747.81 × 13,114.80
4. Step 4: Simplify right side
   31,820.94x = 626,202,978.59
5. Step 5: Solve for x
   x = 626,202,978.59/31,820.94
6. Step 6: Final answer
   x = 19,678.96