Finding the Fourth Proportional to 39,036.86, 53,870.94 and 21,132.02

Step by Step Solution

1. Step 1: Write the proportion equation
   39,036.86 : 53,870.94 = 21,132.02 : x
2. Step 2: Convert to fraction form
   39,036.86/53,870.94 = 21,132.02/x
3. Step 3: Cross multiply
   39,036.86x = 53,870.94 × 21,132.02
4. Step 4: Simplify right side
   39,036.86x = 1,138,401,781.50
5. Step 5: Solve for x
   x = 1,138,401,781.50/39,036.86
6. Step 6: Final answer
   x = 29,162.23