Finding the Fourth Proportional to 21,111.84, 31,637.52 and 10,730.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.84 : 31,637.52 = 10,730.88 : x
2. Step 2: Convert to fraction form
   21,111.84/31,637.52 = 10,730.88/x
3. Step 3: Cross multiply
   21,111.84x = 31,637.52 × 10,730.88
4. Step 4: Simplify right side
   21,111.84x = 339,498,430.62
5. Step 5: Solve for x
   x = 339,498,430.62/21,111.84
6. Step 6: Final answer
   x = 16,080.95