Finding the Fourth Proportional to 21,094.32, 31,665.93 and 12,335.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,094.32 : 31,665.93 = 12,335.52 : x
2. Step 2: Convert to fraction form
   21,094.32/31,665.93 = 12,335.52/x
3. Step 3: Cross multiply
   21,094.32x = 31,665.93 × 12,335.52
4. Step 4: Simplify right side
   21,094.32x = 390,615,712.83
5. Step 5: Solve for x
   x = 390,615,712.83/21,094.32
6. Step 6: Final answer
   x = 18,517.58