Finding the Fourth Proportional to 31,665.32, 47,514.18 and 12,959.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,665.32 : 47,514.18 = 12,959.18 : x
2. Step 2: Convert to fraction form
   31,665.32/47,514.18 = 12,959.18/x
3. Step 3: Cross multiply
   31,665.32x = 47,514.18 × 12,959.18
4. Step 4: Simplify right side
   31,665.32x = 615,744,811.17
5. Step 5: Solve for x
   x = 615,744,811.17/31,665.32
6. Step 6: Final answer
   x = 19,445.40