Finding the Fourth Proportional to 39,066.74, 53,912.06 and 21,162.10

Step by Step Solution

1. Step 1: Write the proportion equation
   39,066.74 : 53,912.06 = 21,162.10 : x
2. Step 2: Convert to fraction form
   39,066.74/53,912.06 = 21,162.10/x
3. Step 3: Cross multiply
   39,066.74x = 53,912.06 × 21,162.10
4. Step 4: Simplify right side
   39,066.74x = 1,140,892,404.93
5. Step 5: Solve for x
   x = 1,140,892,404.93/39,066.74
6. Step 6: Final answer
   x = 29,203.68