Finding the Fourth Proportional to 31,414.77, 47,112.89 and 13,405.95

Step by Step Solution

1. Step 1: Write the proportion equation
   31,414.77 : 47,112.89 = 13,405.95 : x
2. Step 2: Convert to fraction form
   31,414.77/47,112.89 = 13,405.95/x
3. Step 3: Cross multiply
   31,414.77x = 47,112.89 × 13,405.95
4. Step 4: Simplify right side
   31,414.77x = 631,592,980.67
5. Step 5: Solve for x
   x = 631,592,980.67/31,414.77
6. Step 6: Final answer
   x = 20,104.97