Finding the Fourth Proportional to 14,081.31, 21,120.35 and 3,693.87

Step by Step Solution

1. Step 1: Write the proportion equation
   14,081.31 : 21,120.35 = 3,693.87 : x
2. Step 2: Convert to fraction form
   14,081.31/21,120.35 = 3,693.87/x
3. Step 3: Cross multiply
   14,081.31x = 21,120.35 × 3,693.87
4. Step 4: Simplify right side
   14,081.31x = 78,015,808.79
5. Step 5: Solve for x
   x = 78,015,808.79/14,081.31
6. Step 6: Final answer
   x = 5,540.38