Finding the Fourth Proportional to 23,985.94, 33,153.15 and 21,131.50

Step by Step Solution

1. Step 1: Write the proportion equation
   23,985.94 : 33,153.15 = 21,131.50 : x
2. Step 2: Convert to fraction form
   23,985.94/33,153.15 = 21,131.50/x
3. Step 3: Cross multiply
   23,985.94x = 33,153.15 × 21,131.50
4. Step 4: Simplify right side
   23,985.94x = 700,575,789.23
5. Step 5: Solve for x
   x = 700,575,789.23/23,985.94
6. Step 6: Final answer
   x = 29,207.77