Finding the Fourth Proportional to 31,597.70, 47,423.82 and 12,888.05

Step by Step Solution

1. Step 1: Write the proportion equation
   31,597.70 : 47,423.82 = 12,888.05 : x
2. Step 2: Convert to fraction form
   31,597.70/47,423.82 = 12,888.05/x
3. Step 3: Cross multiply
   31,597.70x = 47,423.82 × 12,888.05
4. Step 4: Simplify right side
   31,597.70x = 611,200,563.35
5. Step 5: Solve for x
   x = 611,200,563.35/31,597.70
6. Step 6: Final answer
   x = 19,343.20