Finding the Fourth Proportional to 31,677.48, 47,498.58 and 12,970.62

Step by Step Solution

1. Step 1: Write the proportion equation
   31,677.48 : 47,498.58 = 12,970.62 : x
2. Step 2: Convert to fraction form
   31,677.48/47,498.58 = 12,970.62/x
3. Step 3: Cross multiply
   31,677.48x = 47,498.58 × 12,970.62
4. Step 4: Simplify right side
   31,677.48x = 616,086,031.72
5. Step 5: Solve for x
   x = 616,086,031.72/31,677.48
6. Step 6: Final answer
   x = 19,448.71